Channels that permit the passage of this substance can be divided into the L type, P type, and T type, and it can trigger its own release by binding to the ryanodine receptor. Proteins that bind to it often have the EF-hand motif, and by binding to synaptotagmin it triggers the release of neurotransmitters into synapses. Like DAG, this substance activates protein kinase C. It can be released by the action of inositol triphosphate after PIP2 cleavage by (*) phospholipase 
Channels that permit the passage of this substance can be divided into the L type, P type, and T type, and it can trigger its own release by binding to the ryanodine receptor. Proteins that bind to it often have the EF-hand motif, and by binding to synaptotagmin it triggers the release of neurotransmitters into synapses. Like DAG, this substance activates protein kinase C. It can be released by the action of inositol triphosphate after PIP2 cleavage by (*) phospholipase C. The sarcoplasmic reticulum stores this ion, and when it is released it binds to troponin and causes muscle contraction. Calmodulin binds to this ion, which is absorbed in the intestin
Channels that permit the passage of this substance can be divided into the L type, P type, and T type, and it can trigger its own release by binding to the ryanodine receptor.
calcium ion [or Ca or C-a-two-plus]