the cytoskeleton proteins on the sarcomere

titin

large elastic longitudinal protien that goes from z disk to M line to stabilize the myosin in length

nebulin

an inelastic longitudinal protien attatched to the z lines that wrapas around actin to control length and assists A actinin in anchoring the thin filament to Z lines

a actinin

bundles thin (actin) filaments into parallel arrays and anchors the thin filaments to the Z disk.

tropomodulin

an actin capping protien that maintains and regulates the length of the thin filaments

tropomysosin

stabilizes thin filaments and regulates contraction

M line proteins

myomesin, M protiens, obscurin

• hold thick filaments in register at the M line

desmin and dystrophin

anchor sarcomeres to the plasma membrane

sarcoglycans

transmembrane protiens in the huge complex responsible for connecting the muscle cytoskeleton to the extracellular matrix, preventing damage to the muscle sarcolemma