Which of the following is an anchoring protein?
Correct Answer: Actinin
Description: Some additional structural proteins that are impoant in skeletal muscle function include actinin, titin, and desmin. Actinin binds actin to the Z lines. Titin, the largest known protein (with a molecular mass near 3,000,000 Da), connects the Z lines to the M lines and provides scaffolding for the sarcomere. It contains two kinds of folded domains that provide muscle with its elasticity. At first, when the muscle is stretched there is relatively little resistance as the domains unfold, but with fuher stretch, there is a rapid increase in resistance that protects the structure of the sarcomere. Desmin adds structure to the Z lines in pa by binding the Z lines to the plasma membrane. Ref: Ganong 25th ed, p 101
Category:
Biochemistry
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now