<prompt> A small Ca2 binding protein that modifies the activity of many enzymes and other proteins m response to changes in Ca2 concentration, is known asCyclineCalmodulinCollagenKinesin  <response>: Calmodulin is a calcium-binding regulatory protein, with a molecular weight of 17,000 daltonsIt can bind with 4 calcium ionsCalcium binding leads to activation of enzymes. It is a pa of various regulatory kinasesRef: DM Vasudevan, 7th edition, page no: 503, 504 