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Fig. 9. XPOX2 expression in the anterior VBI. Double whole-mount in situ hybridisation for the haematopoietic transcription factor, SCL (pale blue), in combination with POX2 (magenta). Embryos were photographed successively after the colour reactions for the SCL (A–D) and POX2 (E–H) probes were developed. High magnification ventral views of the site of myeloid cell development at stages 20 (A,E), 22 (B,F) and 24 (C,G). (D,H) High magnification ventral views of the trunk of a stage 28 embryo showing the posterior VBI. LS, lateral SCL expression; PS, posterior SCL expression; pVBI, posterior ventral blood island; A, anterior; P, posterior; red arrow, narrow rostral POX2 expression within heart field. |
