. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CELL CYCLE 205. Figure 1. Effect ofD2O on tin- /ir\t meiotic division in Chaetopterus pergamentaceous oocytes. (A). (B) Melaphasc and antiphase, respectively, of I he first meiolic division in control oocytes. fC). (D) First meiotic division in the oocyte treated with 40% £>,0 prior hi fertilization. Note the increase in spindle size and hireringence in mctaphase (C) in comparison to control oocyles ,-h the D:O-lrcalcd oocyte goes through anaphase. the spindle fibers shorten and spindle birefringence decreases (D) of spin
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CELL CYCLE 205. Figure 1. Effect ofD2O on tin- /ir\t meiotic division in Chaetopterus pergamentaceous oocytes. (A). (B) Melaphasc and antiphase, respectively, of I he first meiolic division in control oocytes. fC). (D) First meiotic division in the oocyte treated with 40% £>,0 prior hi fertilization. Note the increase in spindle size and hireringence in mctaphase (C) in comparison to control oocyles ,-h the D:O-lrcalcd oocyte goes through anaphase. the spindle fibers shorten and spindle birefringence decreases (D) of spindle fibers during anaphase chromosome movement. The inability of D:O to prevent disassembly of anaphase spindle mi- crotubules may indicate that the concentration of assembly- competent tubulin is reduced in cells completing anaphase. We thank Rudolf Oldenbourg for his help with the use of the pol-scope. We also thank Universal Imaging Corporation for the Physiology post-course fellowship to M. K. This work was supported by the NIH grant R37 GM31617 awarded to S. I. Literature Cited 1. Olmsted, J. B., and G. G. Borisy. 1973. Biochemistry 12: 4282- 4289. 2. Ito, T. J., and 1984. Biochnn. Biop/ns .lew 800: 21-27. 3. Inoue, S., and H. Sato. 1967. ./. Gen. Physiol. Suppl. 50: 259-288. 4. Gross, P. R., and \V. Spindel. 1960. Science 131: 37-39. 5. Inoue, S. 1952. E\p. Cell. Res Suppl. 2: 305-318. 6. Oldenbourg, R., and G. Mei. 1995. ./ Microbe., in 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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