>2l12_B mol:protein length:15 Histone H3 ARTKQTARKSTGGKA >2l12_A mol:protein length:56 Chromobox homolog 7 GEQVFAVESIRKKRVRKGKVEYLVKWKGWPPKYSTWEPEEHILDPRLVMAYEEKEE >2l12_B mol:protein length:15 Histone H3 ARTKQTARKSTGGKA