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Fig. 4. Expression patterns of transgenes directed by 637/+196 and
986/+75 regulatory regions of Bop at different developmental
stages. (A-H) Transgenic embryos of the indicated ages from a stable
transgenic line harboring construct 2 (637/+196; see
Fig. 2). (A-D,G,H) Frontal
views; (E) right-side view; (F) transverse section. Two independent stable
transgenic lines displayed identical patterns of lacZ expression.
(I-P) Transgenic embryos of the indicated ages from a stable transgenic line
harboring construct 4 (986/+75; see
Fig. 2). (J,K) Enlarged regions
of the embryo shown in I. (M,N) Transverse sections at different levels of the
embryo shown in L. (P) Transverse section of the embryo shown in O. rv, right
ventricle; lv, left ventricle; oft, outflow tract; vc, common ventricular
chamber; m, myotome;