The inside of a mouse’s nose looks chaotic under a standard microscope: millions of sensory neurons packed into a thin, mucus ...
S. Piccolo, Y. Sasai, B. Lu, E.M. De Robertis, "Dorsoventral patterning in Xenopus: Inhibition of ventral signals by direct binding of chordin to BMP-4," Cell, 86:589-98, 1996. (Cited in more than 170 ...