Decreased galactosylation of N-linked protein glycosylation

What it means

A reduction in the amount of galactose residues of N-glycans.

The majority of complex and hybrid N-glycans have elongated branches that are made by the addition of a beta-linked galactose residue to the initiating N-acetylglucosamine to produce the ubiquitous building block Gal-beta-linked1-4GlcNAc, referred to as a type-2 N-acetyllactosamine (LacNAc) sequence.

Rare diseases that can present with this1

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category