特殊的糖蛋白
大部分蛋白质都是糖蛋白；蛋白与碳水化合物共价连接。在大部分情况下，糖蛋白中的蛋白部分占总分子量的大部分，主要负责功能。然而，对于粘蛋白而言，碳水化合物占了分子量的大部分，并承担主要的生物学功能。胎球蛋白是血浆中发现的另一个高度糖基化的蛋白，它通常作为蛋白糖基化研究的阳性对照。
Special Glycoproteins
Most proteins are glycoproteins; proteins covalently linked to carbohydrates. More frequently, the protein portion of a glycoprotein accounts for the majority of the total molecular weight and is mainly responsible for function. In the case of a mucin, however, the carbohydrate may account for the majority of the molecular weight and assume major biological functions. Fetuin is another highly glycosylated protein found in plasma that is routinely used as a positive control for studying protein glycosylation.
Cystatin Glycoproteins
Mucins