<prompt> A small ca2 binding protein that modifies the activity of many enzymes and other proteins in response to changes of ca2 concentration, is known asCyclineCalmodulinCollagenKinesin  <response>: Ans. b CalmodulinRef: Ganong, 25th edp.55Once inside the cell, Calcium binds with calmodulin.This calcium - calmodulin complex activates an enzyme called calmodulin dependent protein kinases that phosphorylates many downstream effector proteins 