请将下列英文换一种语句表述方式Proteoglycans are glycoconjugates that have one or more glycosaminoglycan GAG such as chondroitin sulfate heparan sulfate and keratan sulfate Glycosphingolipids are molecules composed o

Glycoconjugates known as proteoglycans contain one or more glycosaminoglycan (GAG) molecules, including chondroitin sulfate, heparan sulfate, and keratan sulfate. Meanwhile, glycosphingolipids consist of a lipid ceramide linked to a glycan molecule. Typically, the categorization of glycosphingolipids based on their glycan components has been both structural and functional in nature.