Ectonucleoside triphosphate diphosphohydrolase 3 MFTVLTRQPC EQAGLKALYR TPTIIALVVL LVSIVVLVSI TVIQIHKQEV LPPGLKARAL FTASHFSLTL SSEWRSQMEG RDWPQIREHF LLCTGWKVWY CAGCRVFKNH SLRVSMASRK RE