Coagulation factor IX (EC 3.4.21.22) (Christmas factor) (Plasma thromboplastin component) (PTC) [Cleaved into: Coagulation factor IXa light chain; Coagulation factor IXa heavy chain]
1_MQRVN 6_ MIMAE 11_ SPGLI 16_ TICLL 21_ GYLLS 26_ AECTV 31_ FLDHE 36_ NANKI 41_ LNRPK 46_ RYNSG 51_ KLEEF 56_ VQGNL 61_ ERECM 66_ EEKCS 71_ FEEAR 76_ EVFEN 81_ TERTT 86_ EFWKQ 91_ YVDGD 96_ QCESN 101_ PCLNG 106_ GSCKD 111_ DINSY 116_ ECWCP 121_ FGFEG 126_ KNCEL 131_ DVTCN 136_ IKNGR 141_ CEQFC 146_ KNSAD 151_ NKVVC 156_ SCTEG 161_ YRLAE 166_ NQKSC 171_ EPAVP 176_ FPCGR 181_ VSVSQ 186_ TSKLT 191_ RAETV 196_ FPDVD 201_ YVNST 206_ EAETI 211_ LDNIT 216_ QSTQS 221_ FNDFT 226_ RVVGG 231_ EDAKP 236_ GQFPW 241_ QVVLN 246_ GKVDA 251_ FCGGS 256_ IVNEK 261_ WIVTA 266_ AHCVE 271_ TGVKI 276_ TVVAG 281_ EHNIE 286_ ETEHT 291_ EQKRN 296_ VIRII 301_ PHHNY 306_ NAAIN 311_ KYNHD 316_ IALLE 321_ LDEPL 326_ VLNSY 331_ VTPIC 336_ IADKE 341_ YTNIF 346_ LKFGS 351_ GYVSG 356_ WGRVF 361_ HKGRS 366_ ALVLQ 371_ YLRVP 376_ LVDRA 381_ TCLRS 386_ TKFTI 391_ YNNMF 396_ CAGFH 401_ EGGRD 406_ SCQGD 411_ SGGPH 416_ VTEVE 421_ GTSFL 426_ TGIIS 431_ WGEEC 436_ AMKGK 441_ YGIYT 446_ KVSRY 451_ VNWIK 456_EKTKL
1: Factor IX is a vitamin K-dependent plasma protein that participates in the intrinsic pathway of blood coagulation by converting factor X to its active form in the presence of Ca(2+) ions, phospholipids, and factor VIIIa