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Antibodies

1284 Results

Name Source Clonality &
Isotype
Host &
Formulation
Method Reactivity Immunogen/
Epitope
Specificity Availability
MAPKs From manufacturers (100)
Accurate polyclonal
Rabbit
(IgG fraction)
- - (aa 351-368) - -
Accurate polyclonal
Rabbit
(IgG fraction)
IB Mouse N-terminus(aa 87-99) 39 kDa MKP-1 -
Accurate polyclonal
Rabbit
- Human, Mouse, Rat - - -
Accurate polyclonal
Rabbit
(IgG fraction, Agarose)
- Human, Mouse, Rat - - -
Accurate monoclonal

(purified, ALP)
- - - - -
Accurate monoclonal

(purified, FITC)
- - - - -
Accurate monoclonal

(purified)
- - - - -
Abcam polyclonal
IgG
Rabbit
(liquid, PBS, glycerol, BSA, azide, affinity purified)
IF, WB Human Immunogen = synthetic peptide derived from the region of human ERK 1 + 2 that contains threonine 202/185 and tyrosine 204/187 ERK1 and ERK2 (phospho T185 + T202) -
Abcam polyclonal
IgG
Rabbit
(liquid, whole antisera, PBS, glycerol)
WB Human, Mouse, Rat Immunogen = synthetic phospho-peptide corresp. to residues around Thr202/Tyr204 of human p44 MAP kinase (Erk1) (KLH coupled) ERK1 phosphorylated at Thr202 and Tyr204 and ERK1 phosphorylated at Thr183 and Thr185 -
Abcam polyclonal
IgG
Rabbit
(liquid, HEPES, BSA, glycerol, azide, Protein A purified)
WB Zebra, Human, Mouse, Rat, Fish (various) Immunogen = synthetic peptide corresp. to an aa sequence within MAPK which includes phosphorylated Thr 202 and Tyr 204 MAPK/ERK, when phosphorylated at threonine 202 and tyrosine 204 -
Abcam polyclonal
IgG
Rabbit
(liquid, HEPES, NaCl, BSA, Protein A purified)
WB Human, Mouse, Rat, Xenopus Immunogen = phospho-peptide corresp. to aa residues surrounding phospho-Thr202 and phospho-Tyr204 of rat ERK/MAPK Phospho-Thr202/Thr204 ERK/MAPK protein -
Accurate polyclonal
Rabbit
(purified)
WB Mouse, Rat - ~43 kDa MAPK -
Accurate polyclonal
Rabbit
(purified)
WB Human, Mouse, Rat - ~48 kDa MEK1; no cross with non-phos -
Accurate polyclonal
Rabbit
(purified)
WB Human, Mouse, Rat - ~48 kDa MEK1; no cross with non-phos -
Accurate polyclonal
Rabbit
(purified)
WB Human, Mouse, Rat - ~48 kDa MEK1; no cross with non-phos -
Accurate polyclonal
Rabbit
(purified)
WB Human, Mouse - ~45 kDa MEK1/2; no cross with non-phos -
Accurate polyclonal
Rabbit
(purified)
IH, IP, WB Human, Mouse, Rat, Xenopus - ~48 kDa MEK1 -
Accurate polyclonal
Rabbit
(purified)
WB Human, Mouse, Rat - 42 kDa ERK2, N-terminal -
Accurate polyclonal
Rabbit
(purified)
WB Human, Mouse, Rat, Xenopus, Yeast - ~42 kDa ERK2 -
Accurate polyclonal
Rabbit
(purified)
WB Human, Mouse, Rat, Xenopus, Yeast - ~62 and 45 kDa ERK3 -
Accurate polyclonal
Rabbit
(purified)
WB Human, Mouse, Rat, Xenopus, Yeast - 42 kDa ERK2 -
Accurate polyclonal
Rabbit
(purified)
IC, IH, WB Human, Rat - ~42 & 44 kDa dual phos. ERK1/2 -
Accurate polyclonal
Rabbit
(purified)
IH, IP, WB Human, Mouse, Rat, Bovine - ~100 kDa ERK5 -
Biomol Enzo Life Sciences polyclonal
Rabbit
(chromo purified, phosphate buffer, BSA, azide)
WB Human, Mouse, Rat, Bovine Immunogen = peptide derived from amino acids 317-339 of human ERK1 (MAPK). Sequence conserved in human and rat. Recognizes ERK1 and ERK2 equally. -
Biomol Enzo Life Sciences monoclonal
Mouse
(PBS, BSA, azide, lyophilized)
WB Human, Mouse, Rat, Bovine Immunogen = phosphopeptide containing the motif pThr-Glu-pTyr conjugated to a carrier protein Recognizes activated mammalian ERK1/2 and exhibits no reactivity with non-activated MAP kinases. In ELISA and dot blotting studies with synthetic peptides as antigens, AMK1 does not react with the TEY motif when only the Thr or Tyr is phosphorylated. Moreover, no cross with the phospho. motifs of SAPK/JNK (Thr-Pro-Tyr) or p38 kinases (Thr-Gly-Tyr) -
Biomol Enzo Life Sciences polyclonal
Rabbit
(chromo purified antibody in phosphate buffer, carrier and preservative free)
IH, WB Human, Mouse, Rat, Chicken Immunogen = phosphopeptide derived from the region of ERK1&2 that contains Thr 202/185 and Tyr 204/187 based on the human sequence; region conserved across many species Recognizes phospho. ERK1/2 and will not cross react with unphospho. ERK1&2 -
AMS Biotechnology polyclonal
Rabbit
(purified)
- Human - - -
AMS Biotechnology polyclonal
Rabbit
(affinity purified)
IC, IP, WB Sheep, Human, Mouse, Rat, Chicken - detects 43 kDa MAP kinase and the double phosphorylated Erk1 (44 kDa) and the 42 kDa MAP kinase -
BioVision polyclonal
Rabbit
(affinity purified)
IC, IP, WB Sheep, Human, Mouse, Rat, Chicken - detects 43 kDa MAP kinase and the double phosphorylated Erk1 (44 kDa) and the 42 kDa MAP kinase -
AMS Biotechnology polyclonal
Rabbit
WB Human, Mouse, Rat - detects Erk5 -
BioVision polyclonal
Rabbit
WB Human, Mouse, Rat - detects Erk5 -
AMS Biotechnology polyclonal
Rabbit
IH, IP, WB Human, Mouse, Rat - detects only phospho. Erk1/2 -
Biotrend monoclonal
IgG1
Mouse
(Ig fraction)
IP, WB - - C-terminal ERK2/ MAPK2 -
Biotrend monoclonal
IgG1
Mouse
(Ig fraction)
IP, WB Human, Rat, Xenopus - MAP1/2, pT-E-pY motif -
BioVision polyclonal
Rabbit
(affinity purified, PBS, BSA, glycerol, thymerosal)
IH, IP, WB Human, Mouse, Rat immunogen = synthetic peptide from human p44 MAP kinase p44/42 MAP kinase (Erk1/Erk2) -
Abcam polyclonal
IgG
Rabbit
(liquid, PBS, gelatin, azide, affinity purified)
IH, IP, WB Human, Mouse, Rat Immunogen = synthetic peptide mapping within the subdomain XI of rat ERK1 Reacts with ERK1 p44 and to a lesser extent ERK2 p42 -
Abcam polyclonal
IgG
Rabbit
(liquid, PBS, azide, affinity purified)
ELISA, IP, WB Cow, Pig, Human, Rabbit, Mouse, Rat Immunogen = rat ERK C-terminal peptide L K E L I F Q E T A R F Q P G conjugated to KLH and BSA Specific for p44 ERK1 and will not react with p42 ERK1 -
Abcam polyclonal
IgG
Rabbit
(liquid, PBS, gelatin, azide, Protein G purified)
WB Human Immunogen = synthetic peptide corresp. to aa 350-400 of human ERK1 conjugated to KLH ERK1 -
Abcam polyclonal
IgG
Rabbit
(liquid, PBS, azide, affinity purified, conj. to HRP)
ELISA, IP, WB Cow, Pig, Human, Rabbit, Mouse, Rat Immunogen = rat ERK C-terminal peptide conjugated to KLH and BSA Reacts with p44 ERK1 but not with p42 ERK1 -
Abcam polyclonal
IgG
Rabbit
(liquid, PBS, BSA, azide, affinity purified)
IH Human, Mouse, Rat Immunogen = synthetic peptide to C-terminal of rat ERK1(unfortunately, the amino acid sequence is considered to be commercially sensitive) ERK1 -
Abcam polyclonal
IgG
Sheep
(liquid, PBS, azide)
IP Human, Rat Immunogen = recombinant p42/p44 MAP kinase protein ERK1 + ERK2 -
Abcam polyclonal
IgG
Rabbit
(liquid, PBS, BSA, azide, conj. to FITC)
FC, IH, WB Human, Various species Immunogen = synthetic peptide derived from the region of human ERK 1 + 2 that contains threonine 202/185 and tyrosine 204/187 ERK 1 + 2/ MAPK containing a phosphate on threonine 202 and tyrosine 204 (ERK1) and threonine 185 and tyrosine 187 (ERK2) -
Abcam polyclonal
IgG
Rabbit
(liquid, PBS, BSA, azide, Protein A purified, conj. Alexa Fluor® 488)
IF Human, Mouse, Rat Immunogen = synthetic phospho-peptide derived from the region of ERK1 that contains threonine 202 (corresp. to 185 in ERK2) and tyrosine 204 (corresp. to 187 in ERK2) ERK1 and ERK2 -
Abcam monoclonal
IgG1
Mouse
(liquid, PBS, BSA, azide, Protein G purified)
WB Human, Mouse, Rat Immunogen = synthetic peptide corresponding to residues around C-terminal of human ERK2 ERK2 -
Abcam polyclonal
IgY
Chicken
(liquid, PBS, affinity purified)
WB Human, Mouse, Rat Immunogen = recombinant fragment, corresp. to aa 232-360 of human ERK2 ERK2 -
CEDARLANE Laboratories polyclonal
Rabbit
(purified)
- Human, Mouse, Rat - Erk2 -
CEDARLANE Laboratories polyclonal
Rabbit
(affinity purified)
- - - Erk1/2 -
Abcam polyclonal
IgG
Rabbit
(liquid, PBS, BSA, azide, affinity purified)
IH, IP, WB Human, Mouse, Rat Immunogen = synthetic peptide around C-terminus of mouse ERK2(unfortunately, the aa sequence is commercially sensitive) ERK2 -
Abcam polyclonal
IgG
Rabbit
(liquid, PBS, BSA, azide, affinity purified, pre-diluted)
IH Human, Mouse, Rat Immunogen = synthetic peptide around the C-terminus of mouse ERK2(unfortunately, the aa sequence is commercially sensitive) ERK2 -
Abcam polyclonal
IgG
Rabbit
(liquid, PBS, gelatin, azide, affinity purified)
IF, IH, IP, WB Human, Mouse, Rat Immunogen = synthetic peptide to C-terminal of rat ERK2 ERK2 p44 and to a lesser extent ERK1 p42 -
Abcam polyclonal
IgG
Goat
(liquid, Tris buffered saline, BSA, azide, affinity purified)
ELISA, WB Cow, Mouse, Rat Immunogen = Synthetic peptide: C A A G P E M V R G Q V F, corresp. to aa 9-19 of human ERK2 ERK2 / MAPK1 -
Abcam polyclonal
IgY
Chicken
(liquid, PBS, affinity purified)
WB Human, Mouse, Rat Immunogen = synthetic peptide H S S S E R F L E Q S H S S M E, corresp. to aa 401-416 of human ERK3 ERK3 -
Abcam polyclonal
IgG
Rabbit
(liquid, PBS, BSA, glycerol, azide, affinity purified)
IH, WB Human, Mouse Immunogen = synthetic phospho-peptide derived from the region of human ERK5 that contains threonine 218 and tyrosine 220 Reacts with endogenous ERK1 and 2 (44 and 42 kDa, respectively) -
ABGENT polyclonal
Ig
Rabbit
(liquid, PBS, azide, Protein G purified)
ELISA, WB Human Immunogen = synthetic peptide selected from aa 269~285 of human ERK2 conj. to KLH ERK2 -
ABGENT polyclonal
Ig
Rabbit
(liquid, PBS, azide, protein G purified)
ELISA Human Immunogen = synthetic peptide selected from aa 707~721 of human ERK3 conj. to KLH ERK3 -
ABGENT polyclonal
Ig
Rabbit
(liquid, PBS, azide, Protein G purified)
ELISA, WB Human, Mouse Immunogen = synthetic peptide selected from aa 542~557 of human ERK4 conj. to KLH ERK4 -
ABGENT polyclonal
Ig
Rabbit
(liquid, PBS, azide, Protein G purified)
ELISA, IH, WB Human - ERK5 -
Acris Antibodies polyclonal
Rabbit
(Ig fraction, azide, purified)
IH Mouse, Rat Immunogen = synthetic peptide derived from C-terminus of mouse ERK-2 protein ERK2 -
Acris Antibodies polyclonal
Rabbit
(liquid, PBS, BSA, azide, Protein A purified)
WB Human, Mouse, Rat Immunogen = synthetic peptide derived from the N-terminus of human ERK2 protein ERK2 -
Acris Antibodies polyclonal
Rabbit
(liquid, PBS, azide, affinity purified)
WB Human, Mouse Immunogen = synthetic peptide derived from aa residues 334-349 of human ERK5/BMK1 protein ERK5/BMK1 -
Acris Antibodies polyclonal
Rabbit
(liquid, PBS, BSA, glycerol, azide, affinity purified)
IH, WB Human Immunogen = synthetic phospho-peptide derived from the region of human ERK5 that contains Thr 218 and Tyr220 ERK5 phosphorylated thr218/tyr220. Some cross reactivity with endogenous ERK1&2. -
Acris Antibodies polyclonal
Rabbit
(liquid, PBS, BSA, azide)
WB Human Immunogen = synthetic peptide derived from human ERK5 that contains phosphorylated threonine 218 and tyrosine 220 p-ERK5 -
Spring Bioscience polyclonal
Rabbit
(liquid, pre-diluted)
IH Human, Mouse, Rat Immunogen = synthetic peptide from the C-terminal of rat ERK1 protein ERK1 -
Axxora monoclonal
IgG1
Mouse
([liquid, available conjugated to Biotin NT-0012-100B or FITC NT-0012-100F])
ELISA, IP, WB Human, Mouse, Rat Immunogen = synthetic peptide corresp. to F L pT E pY V A motif of phosphorylated ERK1/2 (MAPK2/3) Recognizes the F L pT E pY V A motif of ERK1/2 and requires phosphorylation both at the threonine and tyrosine site. No cross-reaction with the non-phosphorylated form of ERK1/2 or with activated JNK or p38 -
Axxora monoclonal
IgG1
Mouse
(lyophilized, PBS, PEG, sucrose, azide, purified)
IP, WB Human, Mouse, Rat Immunogen = peptide comprising the pThr-Glu-pTyr motif in activated ERK1 and ERK2 Recognizes the pThr-Glu-pTyr motif of activated ERK1/2.No cross-reaction with the non-phosphorylated form of ERK1/2 or with activated JNK or p38 -
Axxora monoclonal
IgG1
Mouse
(lyophilized, PBS, PEG, sucrose, azide, purified)
ELISA, IP, WB Dog, Human, Mouse, Rat Immunogen = synthetic peptide corresp. to C-terminal of ERK2 (MAPK2) ERK2. No cross-reaction with ERK1 -
Axxora monoclonal
IgG1
Mouse
ELISA, WB Human Immunogen = synthetic peptide corresp. to a portion of N-terminal ERK2 ERK2 N-terminus -
Axxora monoclonal
IgG1
Mouse
(lyophilized, PBS, PEG, sucrose, azide, purified)
IP, WB Dog, Human, Mouse, Rat Immunogen = peptide comprising the pThr-Glu-pTyr motif in activated ERK1and ERK2 ERK2 C-terminus. No cross-reaction with ERK1 -
AMS Biotechnology polyclonal
Ig
Rabbit
(liquid, PBS, azide, protein G purified)
ELISA, IH, WB Primate (various), Human, Mouse, Rat Immunogen = synthetic peptide selected within aa 1-50 of human ERK1, conj. to KLH ERK1 -
AMS Biotechnology polyclonal
Rabbit
(liquid, frozen, borate buffered saline, affinity purified)
WB Mouse, Rat Immunogen = a 14 residue synthetic peptide A P G G G G G E P R G T A G (C) based on rat ERK1 MAP kinase (residues 7-20) with an added cysteine and coupled to KLH ERK1 (~43 kDa on WB) -
AMS Biotechnology polyclonal
Rabbit
(liquid, azide, pre-diluted)
IH Human, Mouse, Rat Immunogen = synthetic peptide from the C-terminal of rat ERK1 protein ERK1/MAP2 kinase -
AMS Biotechnology polyclonal
Rabbit
(liquid, PBS, BSA, azide, affinity purified)
IH, IP, WB Human, Mouse, Rat Immunogen = synthetic peptide from the C-terminal of rat ERK1 protein ERK1 /MAP2 kinase -
AMS Biotechnology polyclonal
Rabbit
(liquid, PBS, BSA, glycerol, azide, affinity purified)
IC, IH, WB Human, Rat Immunogen = human synthetic ERK1&2 peptide containing phosphroylated threonine 202/185 and tyrosine 204/187. Phosphorylated ERK1 and ERK2 -
AMS Biotechnology polyclonal
Rabbit
(liquid, PBS, BSA, glycerol, thimerosal, affinity purified)
IH, IP, WB Human, Mouse, Rat Immunogen = synthetic peptide from human p44 MAP kinase p44/42 MAP kinase (ERK1/ERK2) -
AMS Biotechnology polyclonal
Rabbit
(liquid, borate buffered saline, affinity purified)
WB Bovine, Yeast, Human, Mouse, Rat, Xenopus Immunogen = a 12 residue synthetic peptide A A G P E M V R G Q V F(C) based on the rat ERK2 with cysteine added and coupled to KLH ERK2 (~42 kDa on WB). No cross-reaction with ERK1 -
Acris Antibodies polyclonal
Rabbit
(liquid, PBS, glycerol, azide, affinity purified)
WB Bovine, Human, Mouse, Rat Immunogen = synthetic peptide derived from aa 317-339 within the C-terminal half of the human ERK1 protein. ERK1&2 -
Acris Antibodies polyclonal
Rabbit
(liquid, PBS, glycerol, BSA, azide, affinity purified)
IH, WB Human Immunogen = synthetic phospho-peptide derived from the region of human ERK1&2 that contains threonine 202/185 and tyrosine 204/187 ERK1&2 phosphrylated Thr185/Tyr187 -
Acris Antibodies polyclonal
Rabbit
(liquid, PBS, glycerol, BSA, azide, affinity purified, conj. to FITC)
FC, IF, WB Human Immunogen = synthetic phospho-peptide derived from the region of human ERK1&2 that contains threonine 202/185 and tyrosine 204/187 ERK1&2 phosphrylated Thr185/Tyr187 -
AMS Biotechnology polyclonal
Rabbit
(liquid, borate buffered saline, affinity purified)
IH, IP, WB Bovine, Chicken, Mussel, Sheep, Human, Mouse, Rat, Xenopus, Drosophila Immunogen = a 35 residue synthetic peptide corresp. to aa 333-367 of rat ERK1 MAP kinase with the CGG spacer group added, coupled to KLH ERK1/2 (~42/~44 kDa by WB) -
Acris Antibodies polyclonal
Rabbit
(liquid, PBS, trehalose, affinity purified)
WB Human, Mouse, Rat Immunogen = full-length recombinant human extracellular signal-regulated kinase-1 (ERK1) ERK1 -
Acris Antibodies polyclonal
IgG
Rabbit
(liquid, PBS, glycerol)
WB Mouse, Rat Immunogen = synthetic phosphorylated peptide corresp. to residues around T202/Y204 of human p44 MAP kinase (ERK1) ERK1/2 phosphorylated -
Acris Antibodies polyclonal
Rabbit
(liquid, PBS, trehalose, affinity purified)
IH, WB Human, Mouse, Rat Immunogen = synthetic phospho-peptide including residue T202/Y204 of ERK1 (MAPK3, p44 MAPK) and residues T185/Y187 of ERK2 (MAPK1, p42 MAPK) ERK1 and ERK2 dually phosphorylated at T202/Y204 and T185/Y187, respectively. -
Acris Antibodies polyclonal
IgG
Rabbit
(liquid, PBS, gelatin, azide, affinity purified)
IH, IP, WB Human, Mouse, Rat Immunogen = peptide mapping to the C-terminus of rat ERK2 Reacts with ERK2 p42 and to a lesser extent ERK1 p44 -
Acris Antibodies polyclonal
Rabbit
(liquid, PBS, trehalose, affinity purified)
IH, WB Human, Mouse, Rat Immunogen = full-length recombinant human extracellular signal-regulated kinase-2 (ERK2, aka MAPK1, p42 MAPK) ERK2 -
AMS Biotechnology polyclonal
Ig
Rabbit
(liquid, PBS, azide, Protein G purification)
ELISA, WB Human Immunogen = synthetic peptide selected from aa 269-285 of human ERK2 ERK2 -
AMS Biotechnology polyclonal
Rabbit
(liquid, PBS, BSA, azide, affinity purified)
IH, IP, WB Human, Mouse, Rat Immunogen = synthetic peptide from the C-terminal of mouse ERK2 protein ERK2 -
AMS Biotechnology polyclonal
Rabbit
(liquid, pre-diluted, ready-to-use)
IH Human, Mouse, Rat Immunogen = synthetic peptide from the C-terminal of mouse ERK2 protein ERK2 -
AMS Biotechnology polyclonal
Rabbit
(liquid, PBS, glycerol, BSA, azide, purified)
IH, WB Human, Mouse, Rat - ERK2 -
AMS Biotechnology polyclonal
Rabbit
(liquid, borate buffered saline, affinity purified)
WB Yeast, Human, Mouse, Rat, Xenopus Immunogen = a 23 residue (303-325) synthetic peptide (C) D R L T A E E A L S H P Y M S I Y S F P T D E based on the rat ERK3 coupled to KLH ERK3 (~62 kDa) -
AMS Biotechnology polyclonal
Ig
Rabbit
(liquid, PBS, azide, Protein G purified)
ELISA Human Immunogen = synthetic peptide selected from aa 707-721 of human ERK3, coupled to KLH ERK3 -
AMS Biotechnology polyclonal
Ig
Rabbit
(liquid, PBS, azide, Protein G purified)
ELISA, WB Human, Mouse Immunogen = synthetic peptide slected from aa 542-557 of human ERK4 ERK4 -
AMS Biotechnology polyclonal
Ig
Rabbit
(liquid, PBS, azide, Protein G purified)
ELISA, IH, WB Human Immunogen = C-terminal of ERK5 ERK5 -
Autogen Bioclear polyclonal
IgG
Rabbit
(liquid, PBS, glycerol)
WB Human, Mouse, Rat Immunogen = synthetic phospho-peptide corresp. to residues around Thr202 /Tyr204 of human p44 MAP kinase (ERK1) coupled to KLH Phosphorylated ERK1/2 -
BioVision polyclonal
Rabbit
(liquid, PBS, glycerol, BSA, azide, purified)
IH, WB Human, Mouse, Rat - ERK2 -
Fisher Scientific polyclonal
IgG
Rabbit
(affinity purified, PBS)
WB - - - -
Fisher Scientific polyclonal
IgG
Rabbit
(liquid, PBS, BSA, glycerol, azide)
WB Human Immunogen = synthetic peptide derived from human ERK5 that contains phosphorylated threonine 218 and tyrosine 220. Detects phospho-ERK5 from human tissues and cells -
Promega polyclonal
IgG
Rabbit
(liquid, affinity purified, PBS)
IC, WB - immunogen = peptide sequence ccorr. to the mono phosphorylated form of ERK1 and ERK2 enzymes phosphorylated on threonine 183 detects ERK1 and ERK2 phosphorylated on threonine183 -
Fisher Scientific polyclonal
IgG
Rabbit
(liquid, affinity purified, PBS)
IC, WB - immunogen = peptide sequence ccorr. to the mono phosphorylated form of ERK1 and ERK2 enzymes phosphorylated on threonine 183 detects ERK1 and ERK2 phosphorylated on threonine183 -
Fisher Scientific polyclonal
IgG
Rabbit
(liquid, affinity purified, PBS)
IC, IH, WB - immunogen = dually phosphorylated Thr/Glu/Tyr region (pTEpY) derived from catalytic core the active form of MAPK enzymes, ERK1 and ERK2 detects only dually phospho. Erk1/2 -
Calbiochem EMD Biosciences polyclonal
IgG
Rabbit
(liquid, HEPES, NaCl, glycerol, BSA)
FC, IH, WB Zebra fish, Human, Hamster, Mouse, Rat Immunogen = synthetic peptide corresp. to aa from rat and human p42 MAP kinase Recognizes the ~42-44 kDa ERK1 and ERK2 proteins -