WFDC2 GI:56699495 WAP four-disulfide core domain 2 precursor 1 mpacrlgpla aalllslllf gftlvsgtga ektgvcpelq adqnctqecv 50 51 sdsecadnlk ccsagcatfc slpndkegsc pqvninfpql glcrdqcqvd 100 101 sqcpgqmkcc rngcgkvscv tpnf