. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. iM^-'iP C/ Figure 1. Metamorphosis in Hydroides elegans in the absence or presence of an inhibitor of macromolecular synthesis. (A) A worm newly metamorphosed in response to a bacteria] biotilm. (B) A worm in which metamorphosis was induced in the presence of the translation inhibitor emetine. (C) The posterior section of the tube of the worm shown in B. Newly metamorphosed worms exposed to induction cues in the presence of the trancription inhibitor DRB have the morphology shown in B. br. branchial radicles; c, collar, pt.
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. iM^-'iP C/ Figure 1. Metamorphosis in Hydroides elegans in the absence or presence of an inhibitor of macromolecular synthesis. (A) A worm newly metamorphosed in response to a bacteria] biotilm. (B) A worm in which metamorphosis was induced in the presence of the translation inhibitor emetine. (C) The posterior section of the tube of the worm shown in B. Newly metamorphosed worms exposed to induction cues in the presence of the trancription inhibitor DRB have the morphology shown in B. br. branchial radicles; c, collar, pt. primary tube; t, secondary calcareous tube. Scale bar = 20 for all micrographs. occurred with exposure to 250 nM emetine, and a reduction of up to 87% occurred in response to 1 emetine (Fig. 10A). Exposure of larvae to 1 emetine for 1 h was sufficient to reduce incorporation of 35S-methionine into newly synthesized protein by 79%. An increase in the length of exposure to 1 juA/ emetine did not substantially reduce the incorporation of the radiolabeled umino acid. A maxi- mum reduction of 81% in 35S-methionine incorporation was detected after 6 h of exposure to 1 ^M emetine (Fig. 10B). An increase in the length of exposure of larvae to 250 nM emetine resulted in lower levels of incorporation of 35S- methionine. Periods of exposure to the inhibitor of 6 and 9 h reduced '^S-methionine incorporation by 68% and 74% respectively, in comparison to controls where no emetine. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
