A Western blot analysis of GRK2, GLI1, PTCH1, and GLI3 protein levels in Flp-In-3T3 cells with lentiCRISPR of 4 different guide RNAs in presence or absence of SAG. α-tubulin was used as loading control. Guide RNA 2 was found to remove Grk2 efficiently and used for subsequent experiments. GLI3 panel shows both full-length (GLI3FL) and repressor form of GLI3 (GLI3R). (n=3) 