In direct ELISAs, no cross-reactivity with recombinant human Wnt-2, -3a, -6, -7a, -7b, recombinant mouse Wnt-1, -2b, -4, -5a, -5b, -8a, -8b, -9b, -10a, -10b, -11, or -16 is observed. WNT9A is a ligand for members of the frizzled family of seven transmemb