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Expression of Ssm1 in early mouse development. B6 females were crossed to B6 males and embryos from various stages of development were analyzed for the expression of Ssm1b (see Fig. 3B legend for details). Ssm1b was expressed up to late E8.5 together with the other Ssm1 family sequences. At E9.5 and in heart and blood, Ssm1b expression ceased while the other Ssm1 family sequences continued to be expressed.
