Biology 2010 Student Edition

Published by Prentice Hall
ISBN 10: 9780133669510
ISBN 13: 978-0-13366-951-0

Chapter 14, Human Heredity - Assessment - 14.2 Human Genetic Disorders - Understand Key Concepts/Think Critically - Page 412: 9



Work Step by Step

Cystic fibrosis is a disease caused by the deletion of three bases from a protein called CTFR, which allows the passage of chloride ions into and out of a cell. The deletion of these three bases deletes a single amino acid, phenylalanine, from the protein. The loss of a single amino acid causes the entire protein to fold incorrectly. The body does not recognize this protein as functional, so it destroys the protein.
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