Polysaccharides are of two main types.
1. Homopolysaccharides
2. Heteropolysaccharides
Heteropolysaccharides are further classified as:
a) GlycosAminoGlycans (GAGs)
b) Glycoconjugates
c) Mucilages
Proteoglycan is a type of glycoconjugates whereas heparan sulfate, dermatan sulfate and hyaluronic acid are examples of GAGs.