. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 242 T. DENO ET AL. 1984). In this study, 64% (234/264) of the dechorionated 8-cell-stage embryos of C. intestinalis formed morphologically normal tailbud stages. However, almost all of these tailbud stages which had developed for more than 8 h produced AChE activity in tail muscle cells (Fig. 3a). In addition to the enzyme activity localized in muscle cells, some control embryos examined at h of development showed the enzyme activity in a strand-like structure in the dorsal region of the head, as did almost all of the c
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 242 T. DENO ET AL. 1984). In this study, 64% (234/264) of the dechorionated 8-cell-stage embryos of C. intestinalis formed morphologically normal tailbud stages. However, almost all of these tailbud stages which had developed for more than 8 h produced AChE activity in tail muscle cells (Fig. 3a). In addition to the enzyme activity localized in muscle cells, some control embryos examined at h of development showed the enzyme activity in a strand-like structure in the dorsal region of the head, as did almost all of the control embryos which had developed for more than 15 h (Fig. 3b). Furthermore, a spot of AChE activity appeared in a region posterior to melanocytes of all 17-h embryos examined (Fig. 3c). This spot appeared to be attached to the strand-like structure (Fig. 3c). From its location, the spot of AChE activity seems to be a part of the central nervous system, which may presumably be the "adult brain," as has been pointed out by Meedel and Whittaker (1979). More than half of dechorionated 8-cell embryos of H. roretzi failed to complete neural-tube formation, resulting in morphologically abnormal embryos. However, these abnormal embryos, as well as morphologically normal tailbud stages which had developed for more than 14 h, showed AChE activity in tail muscle cells (Fig. 4a), suggesting a normal production of AChE in spite of the failure of normal r. 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
