CXCR4 GI:56790927 chemokine (C-X-C motif) receptor 4 isoform a 1 msiplpllqi ytsdnyteem gsgdydsmke pcfreenanf nkiflptiys 50 51 iifltgivgn glvilvmgyq kklrsmtdky rlhlsvadll fvitlpfwav 100 101 davanwyfgn flckavhviy tvnlyssvli lafisldryl aivhatnsqr 150 151 prkllaekvv yvgvwipall ltipdfifan vseaddryic drfypndlwv 200 201 vvfqfqhimv glilpgivil scyciiiskl shskghqkrk alkttvilil 250 251 affacwlpyy igisidsfil leiikqgcef entvhkwisi tealaffhcc 300 301 lnpilyaflg akfktsaqha ltsvsrgssl kilskgkrgg hssvsteses 350 351 ssfhss