DOI 10.1074/jbc.A116.717736 Proprotein convertase subtilisin/Kexin type 9 (PCSK9) single domain antibodies are potent inhibitors of low density lipoprotein receptor degradation. Elodie Weider, Delia Susan-Resiga, Rachid Essalmani, Josée Hamelin, Marie-Claude Asselin, Surendra Nimesh, Yahya Ashraf, Keith L. Wycoff, Jianbing Zhang, Annik Prat, and Nabil G. Seidah PAGE 16665: The units of the apolipoprotein B levels (apoB) measured in Figs. 7 and 8 were incorrect. The correct units are g/ml. This error has now been corrected and does not affect the results or conclusions of the work. THE JOURNAL OF BIOLOGICAL CHEMISTRY VOL. 291, NO. 51, p. 26586, December 16, 2016 © 2016 by The American Society for Biochemistry and Molecular Biology, Inc. Published in the U.S.A.