We thank M. Halfon for providing cDNA clones for several cadherin
genes and the DGRC (Bloomington, IN) for cDNA clones for ds
and C. Bristow for helpful comments on the manuscript. J.J.Z. is
supported by the Fannie and John Hertz Foundation and the
Princeton Wu fellowship. This work has been supported by the following
NIH Grants: P50 GM071508 and R01 GM078079 to S.Y.S.