A reader of the Journal of Bone Mineral Research (JBMR) informed the editors about concern regarding Figs. 1 and 2 in Revollo and colleagues. In consultation with the Committee on Publication Ethics (COPE) guidelines, the editors sought an explanation from the authors for this error. The authors determined that the reader is correct in that the Pthr1 immunoprecipitation bands (Fig. E) were also included in the whole-cell lysate panel (Fig. D). This is an oversight that escaped notice through two rounds of review and one revision. The revised Fig. shows the correct bands for the Pthrp1 immunoblot of the whole-cell lysate. Regarding the other concern, it appears that the reader refers to Fig. A and C (not Fig. 1A and C, as he/she indicated). Indeed, the same actin bands are shown in panels A and C of this figure. We have now replaced the correct actin bands for panel C in the new Fig. This was also an oversight. The error does not affect the results because the quantitative data shown in panels B and D already include all the replicate experiments. Nonetheless, the authors regret the mistakes and apologize for any problems this might have caused. (Figure presented.) (Figure presented.).