Fig. 4From: Two-headed mutants of the lamprey, a basal vertebrateHistological analysis for symmetrically bifurcated mutants by hematoxylin-eosin (HE) staining. Identity numbers for each mutants are shown as #12 and #13. a, d Lateral view of the mutants. Sectioned levels are shown. b, e Transversal sections of two-headed region. c, f Transversal sections of conjunct region. Scale bars: 500 μm for a, d, 100 μm for (b, c, e, f)Back to article page