We suggested mucin 15 (MUC15_HUMAN, Q8N387) on the N-glycosite Asn225 with compositions of N5H6F0S3/N4H5F0S2/N5H6F0S2 and mucin 20 (MUC20_HUMAN, Q8N307) on the N-glycosite Asn616 with compositions of N2H8F0S0; both belong to the MUC family and share the similar structure and functional mechanism to MUC16 and were N-glycosylated and upregulated in the ovarian cancer cell line. This evidence concerns the gene MUC15 and ovarian cancer.