Light meromyosin, like myosin, forms filaments and combines with actin. Tropomyosin is a calcium-binding protein inside the myofibril of a muscle cell. The essence of muscle contraction is a cyclic change both in the shape of the myosin S1 head and in its affinity for actin. The three common aromatic amino acids are phenylalanine, leucine and tryptophan. Methionine and cysteine are sulfur-containing amino acids.
Acetic acid is a strong acid.
An equimolar mixture of NaOH and HCl provides a good buffer for the pH range of 6.5 to 7.5. Both A and C are correct. E. Both B and C are correct. A. Tropomyosin B. Myoglobin C. Troponin D. Myosin E. Actin 17. This structure transmits waves of depolarization from the surface of the muscle cell to the sarcoplasmic reticulum to initiate contraction.