MAP Kinase 1, Recombinant Human, His-Tag, aa1-360 (Mitogen-activated Protein Kinase 1, MAPK 1, MAPK1, ERT1, Extracellular Signal-regulated Kinase 2, ERK2, ERK-2, ERK, MAP Kinase Isoform p42, Mitogen-activated Protein Kinase 2, MAP Kinase 2, MAPK 2, MAPK2, p41mapk, p42-MAPK, P42MAPK, PRKM1, PRKM2)