<p>This family represents a putative ManNAc-6-P-to-GlcNAc-6P epimerase in the N-acetylmannosamine (ManNAc) utilization pathway found mainly in pathogenic bacteria for the reaction:<reaction> N-acyl-D-glucosamine 6-phosphate = N-acyl-D-mannosamine 6-phosphate </reaction>It is probably encoded by the yhcJ gene [<cite idref="PUB00043353"/>].</p>