Fig. 2
From: New insights into mesoderm and endoderm development, and the nature of the onychophoran blastopore
Expression of Tbx1/org1 In all panels, anterior is to the left. Panels A, C and D represent lateral views, dorsal up. Panel B represents a thin section. Panel E represents a dorsal view. Panel A´ represents a SYBR Green staining of the embryo shown in panel A. The double arrowheads in panels A and C point to ventral expression. The asterisks in panels A-D mark segmental expression in newly formed segments. The red asterisk in B marks the enlarged region shown in the inlay in B. The arrow in panels C and E point to expression in the limbs. Arrowheads in panels D and E point to dorsal expression. Filled circles in panel D and E mark patches of stronger expression dorsal to each appendage. Developmental stages are indicated (staging system after [9], their supplementary data). Abbreviations: ect, ectoderm; hl, head lobe; j, jaw; L, leg; mes, mesoderm; sp, slime papilla