CTBS

Reducing-end exoglycosidase involved in glycan degradation. Hydrolyzes N,N'-diacetylchitobiose (GlnNAc2) and higher chitin-oligosaccharides (GlcNAc(n)) to monomeric GlcNAc acting on reducing-end residues. During N-linked glycoprotein degradation, it cleaves single GlcNAc molecules uniquely from the reducing end of N,N'-diacetylchitobiose units linking oligosaccharides to proteins, and therefore it functions after cleavage of the Asn-GlcNAc bond and asparagine removal by glycosylasparaginase (By similarity)..

Function from UniProtKB (Q01459), read 2026-09-23. CC BY 4.0.