<P> Calcium ions are important for cellular signalling , as once they enter the cytosol of the cytoplasm they exert allosteric regulatory effects on many enzymes and proteins . Calcium can act in signal transduction resulting from activation of ion channels or as a second messenger caused by indirect signal transduction pathways such as G protein - coupled receptors . </P>
<P> Calcium ions are important for cellular signalling , as once they enter the cytosol of the cytoplasm they exert allosteric regulatory effects on many enzymes and proteins . Calcium can act in signal transduction resulting from activation of ion channels or as a second messenger caused by indirect signal transduction pathways such as G protein - coupled receptors . </P>
which second messenger molecule acts on the endoplasmic reticulum to release calcium ions
which second messenger molecule acts on the endoplasmic reticulum to release calcium ions
Calcium ions
Calcium ions