CE _ 2 ▁S AT V SE IN SET DF VA K ND Q FI AL T K DT TA HI Q S NS L Q SV E EL HS ST ING V K FE EY L KS Q I ▁AT IG EN L V V R R F AT L K AG ANG V V NG Y I HT NG R V GV VI AA AC D SA EV AS K SR D LL R Q IC M H ▁ ▁NC BI ▁ident ifiers ▁ ▁The ▁NC BI ▁defined ▁a ▁standard ▁for ▁the ▁unique ▁identifier ▁used ▁for ▁the ▁sequence ▁( Seq ID ) ▁in ▁the ▁header ▁line . ▁ ▁This ▁allows ▁a ▁sequence ▁that ▁was ▁obtained ▁from ▁a ▁database ▁to ▁be ▁label led ▁with ▁a ▁reference ▁to ▁its ▁database ▁record . ▁ ▁The ▁database ▁identifier ▁format ▁is ▁understood ▁by ▁the ▁NC BI ▁tools ▁like ▁make blast db ▁and ▁table 2 as n . ▁The ▁following ▁list ▁describes ▁the ▁NC BI ▁FA ST A ▁defined ▁format ▁for ▁sequence ▁ident ifiers . ▁ ▁The ▁vertical ▁bars ▁(" | ") ▁in ▁the ▁above ▁list ▁are ▁not ▁separ ators ▁in ▁the ▁sense ▁of ▁the ▁Back us – N aur ▁form , ▁but ▁are ▁part ▁of ▁the ▁format . ▁Multiple ▁ident ifiers ▁can ▁be ▁concaten ated , ▁also ▁separated ▁by ▁vertical ▁bars . ▁ ▁Se quence ▁representation ▁ ▁Following ▁the ▁header ▁line , ▁the ▁actual ▁sequence ▁is ▁represented . ▁Se qu ences ▁may ▁be ▁protein ▁sequences ▁or ▁nucle ic ▁acid ▁sequences , ▁and ▁they ▁can ▁contain ▁g