Tetraspanin 19 MLRNNKTIII KYFLNLINGA FLVLGLLFMG FGAWLLLDRN NFLTAFDENN HFIVPISQIL IGMGSSTVLF CLLGYIGIHN EIRWLLIVVE SRSVTRLECS GTISAHCNLH LPDSSDSPAS DSEVAGITVC SIDNMDLCCS GCTFSIHHHK ERGGSATMA