HSPCs are impaired in rpc9-/- embryos. (A) WISH showing that ikaros, at 3dpf, and tcrd and tcrb2, at 4dpf, were decreased in the thymus of rpc9-/- embryos. (B) WISH demonstrates that runx1 expression is not decreased in the AGM region of rpc9-/- embryos at 32 h post-fertilization (hpf) and cmyb clearly begins to decrease from 3dpf in the CHT region of rpc9-/- embryos. (C) qRT-PCR with the cDNA reverse transcribed from total RNA of posterior trunk region reveals that cmyb expression is significantly decreased in rpc9-/- embryos from 3 to 5dpf. β-actin was used as internal control (mean±s.d., n=3, **P<0.01, ***P<0.001). (D) Expression pattern of rpc9 in the CHT region at 3 and 4dpf. Note that arrowheads in A mark the thymus, whereas arrowheads in B,D mark the CHT. Values are mean±s.e.m.; **P<0.01, ***P<0.001, Student′s t-test. ns, not significant.
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