This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gram-Positive Infections - Corynebacterial Infections, Subject name: Physiology
[{'content': 'The protein that anchors both actin and titin at Z lines is? \nSelect and explain. \nA. Myomesin, B. Nebulin, C. a-actinin, D. Myosin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) a-actinin(Ref: Gautel et al. Journal of Experimental Biology (2016) 219, 135-145)a-Actinin anchors both titin and actin filaments at Z linesMyomesin and obscurin are the myosin cross linking protein that attaches myosin at M lineNebulin is an acting binding protein that regulates the length of thin filaments', 'role': 'assistant'}]