>tr|S4S0X6|S4S0X6_PETMA Histone H2B OS=Petromyzon marinus
MPDPPASKSAGPAKVPAPKKGSKKAVTKATRKDGKKRRHRRKESYAIYIYKVMKQVHPDT
GISSKAMSIMNSFVNDIFERIASEASRLAHYNKRSTITSREIQTAVRLLLPGELAKHAVS
EGTKAVTKYTSSK