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Ultrastructure and growth of the sea urchin tooth., Kniprath E., Calcif Tissue Res. March 29, 1974; 14 (3): 211-28.


Uptake of actinomycin by sea urchin eggs and embryos., Villee CA, Gross PR., Science. October 17, 1969; 166 (3903): 402-3.


ULTRASTRUCTURAL CHANGES IN THE SURFACE OF THE OOCYTE DURING OOGENESIS OF THE SEA URCHIN, HEMICENTROTUS PULCHERRIMUS., Tsukahara J, Sugiyama M., Dev Growth Differ. February 1, 1969; 10 (3-4): 343-355.


Ultrastructure of the tube foot sucker of a regular echinoid, Diadema antillarum Philippi, with especial reference to secretory cells., Coleman R., Z Zellforsch Mikrosk Anat. January 1, 1969; 96 (2): 151-61.


Ultra-violet irradiation of sea urchin eggs: a study of ultrastructure., Cousineau GH, Paradis JL, Gosselin R., Lab Pract. June 1, 1976; 25 (6): 400-1.


Ultrastructural, fluorescence microscopic and microfluorimetric study of the innervation of the axial complex in the sea urchin, Sphaerechinus granularis (lam.)., Bachmann S, Goldschmid A., Cell Tissue Res. November 20, 1978; 194 (2): 315-26.


Ultrastructural localization of calcium in unfertilized sea-urchin eggs., Cardasis CA, Schuel H, Herman L., J Cell Sci. June 1, 1978; 31 101-15.


UV-irradiation of sea urchin eggs changes the course of the Ca2+-activated ATPase activity., Petzelt C., Exp Cell Res. June 1, 1974; 86 (2): 404-8.


Uptake of 5-iodo-deoxyuridine by a single colony of developing embryos of Arbacia punctulata., Wheeler MB, Grebe S, Harding CV, Wilson WL, Hughes WL., Nature. February 4, 1967; 213 (5075): 514-5.


Ultrastructural changes in the surface of the oocyte during oogenesis of the sea urchin, Hemicentrotus pulcherrimus., Tsukahara J, Sugiyama M., Embryologia (Nagoya). February 1, 1969; 10 (3): 343-55.


Ultrastructure of the tube foot wall of a regular echinoid, Diadema antillarum Philippi., Coleman R., Z Zellforsch Mikrosk Anat. January 1, 1969; 96 (2): 162-72.


Uptake of Ca2+ is one of the earliest responses to fertilization of sea urchin eggs., Paul M, Johnston RN., J Exp Zool. January 1, 1978; 203 (1): 143-9.


Ultrastructural studies of regenerating spines of the sea urchin Strongylocentrotus purpuratus. II. Cell types with spherules., Heatfield BM, Travis DF., J Morphol. January 1, 1975; 145 (1): 51-71.


Ultrastructure of sea urchin tube feet. Evidence for connective tissue involvement in motor control., Florey E, Cahill MA., Cell Tissue Res. February 9, 1977; 177 (2): 195-214.


Ultrastructural observations on changes in cell shape in chromatophores of the sea urchin Centrostephanus longispinus., Weber W, Gras H., Cell Tissue Res. January 1, 1980; 206 (1): 21-33.


Ultrastructural evidence for the existence of steroid synthesizing cells in the ovary of the starfish. Asterias rubens (echinodermata)., Schoenmakers HJ, Colenbrander PH, Peute J., Cell Tissue Res. August 9, 1977; 182 (2): 275-9.


Ultrastructure of the somatic portion of the gonads in asteroids, with emphasis on flagellated-collar cells and nutrient transport., Walker CW., J Morphol. October 1, 1979; 162 (1): 127-161.


Use of an ionophore to maintain repeated caffeine contractures in holothurian muscle., Hill RB., Life Sci. November 24, 1980; 27 (21): 1967-73.


UTILIZATION OF DISSOLVED EXOGENOUS NUTRIENTS BY THE STARFISHES, ASTERIAS FORBESI AND HENRICIA SANGUINOLENTA., Ferguson JC., Biol Bull. April 1, 1967; 132 (2): 161-173.


Ultrastructural and histochemical studies on the epithelium revestment layer in the tube feet of the starfish Asterina stellifera., Santos Hde S, Sasso Wda S., J Morphol. March 1, 1970; 130 (3): 287-96.


Ultrastructural demonstration of trypsin-like protease in acrosomes of sea urchin sperm., Green JD, Summers RG., Science. July 18, 1980; 209 (4454): 398-400.


Ultrastructure of collagen in sea urchin embryos., Crise-Benson N, Carl Benson S., Wilehm Roux Arch Dev Biol. March 1, 1979; 186 (1): 65-70.


Use of sodium dodecyl sulfate, alone, to separate chromatin proteins from deoxyribonucleoprotein of Arbacia punctulata sperm chromatin., Shirey T, Huang RC., Biochemistry. October 1, 1969; 8 (10): 4138-48.


Use of egg membrane lysins in the preparation of sea urchin egg ghosts., Inoue S, Preddie EC, Buday A, Cousineau GH., Exp Cell Res. May 1, 1971; 66 (1): 164-70.


Ultrastructure of species-foreign spermatozoa after penetrating the sea urchin oocyte., Afzelius BA., Acta Embryol Exp (Palermo). January 1, 1972; 1 123-33.


Ultrastructure of the dorsal hemal vessel in the sea-cucumber Parastichopus tremulus (Echinodermata: Holothuroidea)., Jensen H., Cell Tissue Res. July 16, 1975; 160 (3): 355-69.


Uptake and incorporation of [3H]glycerol into lipids of unfertilized and fertilized sea urchin eggs., Karp GC, Hajek AS., Exp Cell Res. January 1, 1977; 104 (1): 79-93.


UPTAKE AND LOCALIZATION OF 3 H-1-METHYLADENINE BY THE GONADAL EPITHELIAL CELLS OF SEA URCHINS IN VITRO., Lee HH, Roberts K., Dev Growth Differ. January 1, 1977; 19 (3): 207-212.


Ultrastructural and histochemical studies on the mucous granules in the tube feet of the starfish Echinaster brasiliensis., Santos Hde S, Sasso Wda S., Experientia. April 15, 1973; 29 (4): 473-4.


Ultrastructure of the gonadal wall of the sea cucumber, Leptosynapta clarki (Echinodermata: Holothuroidea)., Atwood DG., Z Zellforsch Mikrosk Anat. August 3, 1973; 141 (3): 319-30.


Use of the sea urchin egg for quick screen testing of the biological activities of substances. I. Influence of fractions of a tobacco smoke condensate on early development., Bresch H, Spielhoff R, Mohr U, Barkemeyer H., Proc Soc Exp Biol Med. December 1, 1972; 141 (3): 747-52.


Ultrastructural studies of regenerating spines of the sea urchin Strongylocentrotus purpuratus. I. Cell types without spherules., Heatfield BM, Travis DF., J Morphol. January 1, 1975; 145 (1): 13-49.


Uptake and cellular localization of 3H-1-methyladenine and 3H-adenine in the starfish gonad and oocytes., Toole B, Schuetz AW, Boylan E., Gen Comp Endocrinol. February 1, 1974; 22 (2): 199-208.


Ubiquitous and gene-specific regulatory 5' sequences in a sea urchin histone DNA clone coding for histone protein variants., Busslinger M, Portmann R, Irminger JC, Birnstiel ML., Nucleic Acids Res. March 11, 1980; 8 (5): 957-77.


Ultrastructure of the coelomic lining in the podium of the starfish Stylasterias forreri., Wood RL, Cavey MJ., Cell Tissue Res. January 1, 1981; 218 (3): 449-73.


Unusual strength properties of echinoderm calcite related to structure., Weber J, Greer R, Voight B, White E, Roy R., J Ultrastruct Res. March 1, 1969; 26 (5): 355-66.


Ultrastructural changes in the accessory-cells and the oocyte surface of the sea urchin Strongylocentrotus dröbachiensis during Vitellogenesis., Bal AK., Z Zellforsch Mikrosk Anat. January 1, 1970; 111 (1): 1-14.


Ultrastructure and birefringence of the isolated mitotic apparatus of marine eggs., Rebhun LI, Sander G., J Cell Biol. September 1, 1967; 34 (3): 859-83.


Ultrastructlral and histochemical observations of the external epithelium of echinoderm tube feet., de Souza Santos H, da Silva Sasso W., Acta Anat (Basel). January 1, 1974; 88 (1): 22-33.


Urease from a sea urchin Lytechinus variegatus: partial purification and kinetics., Loest RA., Comp Biochem Physiol B. January 1, 1979; 63 (1): 103-7.


Ultrastructure of tubulin paracrystals from sea urchin eggs, with determination of spacings by electron and optical diffraction., Starling D, Burns RG., J Ultrastruct Res. May 1, 1975; 51 (2): 261-8.


Unusual properties of sea urchin unfertilized egg chromatin., Albanese I, Di Liegro I, Cognetti G., Cell Biol Int Rep. February 1, 1980; 4 (2): 201-10.


Units of transcription and translation: sequence components of heterogeneous nuclear RNA and messenger RNA., Lewin B., Cell. February 1, 1975; 4 (2): 77-93.


Unusual gangliosides of eggs and embryos of the sea urchin Strongylocentrotus intermedius. Structure and density-dependence of surface localization., Prokazova NV, Mikhailov AT, Kocharov SL, Malchenko LA, Zvezdina ND, Buznikov G, Bergelson LD., Eur J Biochem. April 1, 1981; 115 (3): 671-7.


Ultrastructure and 3H-thymidine incorporation by chromosome vesicles in sea urchin embryos., Ito S, Dan K, Goodenough D., Chromosoma. January 1, 1981; 83 (4): 441-53.


Uptake and incorporation of leucine and thymidine in developing sea urchin eggs. The effect of D2O., Pinard J, Bellemare G, Aubin A, Daigneault R, Cousineau GH., Exp Cell Res. August 1, 1969; 56 (2): 254-8.


Uptake and release of free amino acids by starfishes., Ferguson JC., Biol Bull. August 1, 1971; 141 (1): 122-9.


Ultrastructure of the basiepithelial nerve plexus of the sea urchin, Centrostephanus longispinus., Weber W, Grosmann M., Cell Tissue Res. January 4, 1977; 175 (4): 551-62.


Ultrastructural studies on the nuclear changes in insufficient-stimulated eggs of the sea urchin., Uto N, Tsukahara J., Cytologia (Tokyo). September 1, 1977; 42 (3-4): 731-42.


Uptake and incorporation of leucine and thymidine in developing sea urchin eggs. The effect of hexahomoserine., Bellemare G, Inard J, Aubin A, Cousineau GH., Exp Cell Res. January 1, 1968; 51 (2-3): 406-12.

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