CD99 molecule (Xg blood group) MARGAALALL LFGLLGVLVA APDGGFDLSD ALPDNENKKP TAIPKKPSAG DDFDLGDAVV DGENDDPRPP NPPKPMPNPN PNHPSSSGSF SDADLADGVS GGEGKGGSDG GGSHRKEGEE ADAPGVIPGI VGAVVVAVAG AISSFIAYQK KKLCFKENGQ LAGSLGPCIG IRREADG