ROR and RYK extracellular region structures suggest that receptor tyrosine kinases have distinct WNT-recognition modes. - Shi F; Mendrola JM; Sheetz JB; Wu N; Sommer A; Speer KF; Noordermeer JN; Kan ZY; Perry K; Englander SW; Stayrook SE; Fradkin LG; et al. (Cell reports, 2021)