Primitive erythroid hypoplasia in Udusq1−/− mutants. (A-L) WISH of scl (A-B), gata1 (C-D), band3 (E-F), and βe3-globin (G-L) expression. (M-N) o-dianisidine staining of 2-dpf wild-type and Udusq1−/− embryos. All embryos are in lateral views with anterior to the left.