>sp|P48557|H2B_HOLTU Histone H2B OS=Holothuria tubulosa OX=7685 PE=3 SV=1 MAPKAPGKGAKKAAKSKAPRAPGDRKRKRTRRESYSIYIYKVMKQVHPDTGISSRAMSIM NSFVNDIFERIAAEASRLAHYNRKSTITSREVQTAVRLLLPGELAKHAVSEGTKAVTKYT TSK