Figure 13 (IMAGE) Impact Journals LLC Caption Regulation of "spine" molecules in HL-60 wt versus Fgr KO cells by RA. HL-60 wt and FGR KO cells were cultured for 72 h in the absence or presence of 1 μM RA as indicated and the whole cell lysate was collected. Twenty-five microgram of lysate per lane was run. (A) Western blots of SDS PAGE-resolved lysates were probed for Numb, Lyn and Vav 1 (n = 3). Films were scanned and bands of interest were quantified using ImageJ. Histograms show normalized densitometric values. Error bars indicate SEM. A representative blot, cropped to show only the band of interest, is included. (B) Western blots of c-Raf, Slp-76 and c-Cbl following the procedure described above. (C) Western blots of GAPDH were used as loading controls following the procedure described above. *p < .05 comparing RA-treated HL-60 wt samples to RA FGR KO cells samples. Credit Correspondence to - Andrew Yen - ay13@cornell.edu Usage Restrictions Copyright: © 2021 Kazim and Yen. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.