▁specific ▁variant ▁that ▁is ▁known ▁to ▁interact ▁with ▁H 2 A . Z . ▁‘ s perm ▁H 2 B ’ ▁is ▁a ▁put ative ▁group ▁that ▁contains ▁s perm ▁H 2 B ▁hist ones ▁from ▁sea ▁and ▁sand ▁ur ch ins ▁and ▁potentially ▁is ▁common ▁for ▁E chin ace a . ▁Rec ently ▁discovered ▁variant ▁H 2 B . E ▁is ▁involved ▁in ▁the ▁reg ulation ▁of ▁ol factory ▁neur on ▁function ▁in ▁m ice . ▁ ▁Dat ab ases ▁and ▁resources ▁ ▁" H ist one DB ▁ 2 . 0 ▁- ▁with ▁variants ", ▁a ▁database ▁of ▁hist ones ▁and ▁their ▁variants ▁maintained ▁by ▁National ▁Center ▁for ▁Bi ote chn ology ▁Information , ▁currently ▁serves ▁as ▁the ▁most ▁compreh ensive ▁manually ▁cur ated ▁resource ▁on ▁hist ones ▁and ▁their ▁variants ▁that ▁follows ▁the ▁new ▁un ified ▁ph y log eny - based ▁nom en cl ature ▁of ▁hist one ▁variants . ▁" H ist ome : ▁The ▁Hist one ▁Inf ob ase " ▁is ▁manually ▁cur ated ▁database ▁of ▁hist one ▁variants ▁in ▁humans ▁and ▁associated ▁post - trans l ational ▁modifications ▁as ▁well ▁as ▁modifying ▁en zym es . ▁MS _ H ist one DB ▁is ▁a ▁prote om ics - orient ed ▁manually ▁cur ated ▁databases ▁for ▁mouse ▁and ▁human ▁hist one ▁variants . ▁ ▁References ▁ ▁External ▁links ▁▁▁ ▁Hist one DB ▁ 2 . 0 ▁- ▁Database ▁of ▁hist ones ▁and ▁variants ▁ ▁at ▁NC BI ▁ ▁Category : Pro te ins <0x0A> </s> ▁Goth am