The sarcoglcyans are a family of five transmembrane proteins (α, β, γ, δ or ε) involved in the protein complex responsible for connecting the muscle fibre cytoskeleton to the extracellular matrix, preventing damage the muscle fibre sarcolemma through shearing forces.
Sarcoglycan
Glycosaminoglycan
Heparan sulfate
Dermatan sulfate
Glycoprotein
Hyaluronic acid 
Cardiolipin
Chondroitin sulfate