Myosin heavy chain isoform expression regulates shortening velocity in smooth muscle: studies using an SMB KO mouse line.

Abstract excerpt

The kinetics of smooth muscle are thought to be partially determined by the level of the expression of the 7 amino acid insert, SMB, in the myosin heavy chain, as SMB is generally expressed at higher levels in faster smooth muscle. In this study, we determined the role of this insert on shortening velocity and force regeneration following rapid reduction in muscle length (k(step)) in bladder tissue from a...

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