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The bent body (bnb) phenotype. Staining for the PECAM-1/CD31 antigen in wild-type (A) and bnb (B) littermates to visualize the developing vascular system. Note the relatively large forelimb buds of the mutant. Arrowhead points out the pericardial edema. Sagittal sections of 9.5-dpc wild-type (C) and bnb (D) littermates. The small, immature somites, pericardial edema, and twisted body axis of the mutant can be seen.
