QUICK SEARCH:

[advanced]

	Author:		Keyword(s):

Home Help Feedback Subscriptions Archive Search Table of Contents

	Help viewing high resolution images
	Return to article

(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)
Click on image to view larger version.

Fig. 2. Trunk to gnathal transformation is more complete in tsh mutant embryos. Each panel shows a whole embryo image and higher magnifications from abdominal segments of two independent individuals. Ectopic structures are indicated in the whole embryo images by arrowheads. (A) Wild-type larval cuticle and normal maxillary structures. (B) Ventral cuticle of a terminal homozygous tsh⁸ larva. Small spots of sclerotized material (arrows in high-magnification panels) are occasionally present. (C) In the trunk segments of prd $->$ Dfd embryos, cirri and, occasionally, rod-shaped sclerotic structures are present. (D) tsh⁸, UAS-Dfd/tsh⁸; prd-Gal4/+ embryos demonstrate a more complete transformation. Mouthpart-like material and cirri are present in each affected segment, with well-shaped mouth hooks frequently observed, though the ectopic sclerotized material also can lack a specific shape. (E) tsh⁸, UAS-Dfd, UAS-disco/tsh⁸; prd-Gal4/+ embryos exhibit a more consistent transformation. Mouth hooks form in all expressing segments, and we did not observe amorphous sclerotized material as seen in tsh⁸, UAS-Dfd/tsh⁸; prd-Gal4/+ embryos shown in D. (F) In tsh⁸, UAS-Dfd, UAS-disco/tsh⁸; arm-Gal4/+ embryos, the trunk-to-maxillary transformation is striking, with ectopic maxillary structures appearing in virtually all segments.

Return to article