Extended Data Figure 9. Absence of antisense transcription at the Hoxa11a and Hoxa11b loci in zebrafish fins.
a, b, Whole-mount in situ hybridization with probes designed to detect putative antisense transcription at Hoxa11a (a) and Hoxa11b (b). c–f, No antisense transcription is detected, whereas expression of Hoxa11a (c), Hoxa11b (d), hoxa13a (e) and Hoxa13b (f) is observed in zebrafish fins at the same stage. Asterisks correspond to the staining from the fin on the other side of the embryo. Original magnification, ×63.