Campbell Biology (10th Edition)

Published by Pearson
ISBN 10: 0321775651
ISBN 13: 978-0-32177-565-8

Chapter 11 - 11.3 - Concept Check: 1

Answer

Protein kinases add phosphate to other proteins, altering the activity of the phosphorylated proteins as part of cell signal transduction. In many pathways there is a phosphorylation cascade in which a series of protein kinases are phosphorylated along a chain.

Work Step by Step

This works since phosphate is a large, strongly charged molecule which can alter protein shape and, thus, function, by its very presence. It is a common and very important part of signal transduction.
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