题目内容
(请给出正确答案)
[单选题]
The Brachury protein is().
A.an early marker of the mesoderm
B.an early marker of the endoderm
C.expressed throughout the ectoderm
D.only expressed after gastrulation
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A.an early marker of the mesoderm
B.an early marker of the endoderm
C.expressed throughout the ectoderm
D.only expressed after gastrulation
CAP(catabolite gene activation protein)or CRP(cAMP—receptor protein)