Strategy for endogenously tagging Celsr1, Fz6 and Vangl2. (A) Schematic of the proposed localization of the core transmembrane PCP proteins at the cellular and junctional level. (B,D,F) Diagram of Celsr1-3xGFP (B), Fz6-3xGFP (D) and tdTomato-Vangl2 (F) fusion proteins illustrating domain structure and the position of insertion. (C,E) Targeting arm design for the C-terminal Celsr1-3xGFP (C) and Fz6-3xGFP (E) insertion. The Celsr1 and Fz6 stop codons targeted by the sgRNA and the C-terminal exons of the Celsr1 (blue) and Fz6 (magenta) genomic region are shown. (G) Targeting arm design for N-terminal fusion of tdTomato-Vangl2. The Vangl2 start codon targeted by the sgRNA and the N-terminal exons (orange) of the Vangl2 genomic region are shown.