<prompt> Largest protein in body is ?TitinMyosinActinTroponin  <response>: Ans. is a i.e.,TitinTitin is a muscle proteinIt connects Z lines with M line in a sarcomereIt is responsible for passive elasticity of a muscleTitin is the third most abundant protein of human body after myosin and actinTitin is the largest protein in human body. It has 34350 aminoacids. 