label: histone H2AXY142 kinase activity
label_lc: histone h2axy142 kinase activity
description: "Catalysis of the reaction: histone H2AX-tyrosine (position 142) + ATP = (histone H2AX-phosphotyrosine (position 142) + ADP. This reaction is the addition of a phosphate group to the serine residue at position 142 of histone variant H2AX."