The calcium binds to the troponin C present on the actin-containing thin filaments of the myofibrils.

In invertebrate smooth muscle, contraction is initiated with calcium directly binding to myosin and then rapidly cycling cross-bridges generating force.

For example, calcium binds to albumin and hypoalbuminemia leads to an increase in free ionized calcium.

When calcium binds there is a structural change whereby the alpha-helical content of the protein increases from 3 to 11%.

However, when calcium binds, the N-terminus is pushed from the annexin core by conformational changes within the protein.

When calcium binds to this site, the MET channels begin to close.

This causes the free calcium present in blood to bind more strongly with albumin.

First, the calcium will bind to calmodulin.

When calcium binds to the calcium sensor synaptotagmin, the clamp would then be released.

The calcium then binds the caseins together and forms micelles, which better enable it to be ingested by infants.