label: histone H2BS14 kinase activity
label_lc: histone h2bs14 kinase activity
description: "Catalysis of the reaction: histone H2B-serine (position 14) + ATP = histone H2B-phosphoserine (position 14) + ADP. This reaction is the addition of a phosphate group to the serine residue at position 14 of histone H2B."