Tags: Protein.

Titin /ˈtaɪtɪn/ also known as connectin is a protein that in humans is encoded by the TTN gene. Titin is a giant protein that functions as a molecular spring which is responsible for the passive elasticity of muscle. It is composed of 244 individually folded protein domains connected by unstructured peptide sequences. These domains unfold when the protein is stretched and refold when the tension is removed.Titin is important in the contraction of striated muscle tissues.

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