Physiology. In the article “Parathyroid hormone leads to the lysosomal degradation of the renal type II Na/P_i cotransporter” by Markus F. Pfister, Isabelle Ruf, Gerti Stange, Urs Ziegler, Eleanor Lederer, Jürg Biber, and Heini Murer, which appeared in number 4, February 17, 1998, of Proc. Natl. Acad. Sci. USA (95, 1909–1914), the authors wish to note that the Acknowledgment section should have included the following grant information: “Dr. Lederer is an employee of and her work is supported by a grant from the U.S. Department of Veterans Affairs.”