Immunogen sequence: SKALSGFSLQ SCRHSIPVFC HSSFYHDTDF LGEELDIVAA KSHEACQKLC TNAVRCQFFT YTPAQASCNE GKGKCYLKLS SNGSPTKI. This gene encodes coagulation factor XI of the blood coagulation cascade. This protein is present in plasma as a zymogen, which is a uni