The function of Ensembl gene identifier ENSG00000168405 (CMAHP, cytidine monophospho-N-acetylneuraminic acid hydroxylase, pseudogene) is as follows. Sialic acids are components of carbohydrate chains of glycoconjugates and are involved in cell-cell recognition and cell- pathogen interactions. That protein has no CMP-N-acetylneuraminate monooxygenase activity and is not able to convert CMP-N- acetylneuraminic acid (CMP-Neu5Ac) into its hydroxylated derivative CMP-N-glycolylneuraminic acid (CMP-Neu5Gc), a sialic acid abundantly expressed at the surface of many cells in vertebrates (PubMed:9624188). However, it may play a role in Wnt signaling (PubMed:19890979). {ECO:0000269|PubMed:19890979, ECO:0000269|PubMed:9624188, ECO:0000303|PubMed:11562455, ECO:0000303|PubMed:12192086, ECO:0000303|PubMed:9751737}.