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Development (1986) 94 (1): 257–265.
Published: 1 June 1986
...Amata Hornbruch; Lewis Wolpert ABSTRACT Hensen’s node from stage 4 to stage 10 shows polarizing activity when grafted to the anterior margin of the chick limb bud. It can specify additional digits though its action is somewhat attenuated when compared with the effect of a grafted polarizing region...