<Li> gamma - carboxylation dependent on Vitamin K </Li> <Li> glycosylation, the addition of a glycosyl group to either arginine, asparagine, cysteine, hydroxylysine, serine, threonine, tyrosine, or tryptophan resulting in a glycoprotein . Distinct from glycation, which is regarded as a nonenzymatic attachment of sugars . <Ul> <Li> polysialylation, addition of polysialic acid, PSA, to NCAM </Li> </Ul> </Li> <Ul> <Li> polysialylation, addition of polysialic acid, PSA, to NCAM </Li> </Ul> <Li> polysialylation, addition of polysialic acid, PSA, to NCAM </Li>

What are some of the modifications that proteins acquire