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Callard, G V; Jorgensen, J C; Redding, J M (1995) Biochemical analysis of programmed cell death during premeiotic stages of spermatogenesis in vivo and in vitro. Dev Genet 16:140-7
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Piferrer, F C; Callard, G V (1995) Inhibition of deoxyribonucleic acid synthesis during premeiotic stages of spermatogenesis by a factor from testis-associated lymphomyeloid tissue in the dogfish shark (Squalus acanthias). Biol Reprod 53:390-8
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Barry, T P; Thomas, P; Callard, G V (1993) Stage-related production of 21-hydroxylated progestins by the dogfish (Squalus acanthias) testis. J Exp Zool 265:522-32
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Cuevas, M E; Collins, K; Callard, G V (1993) Stage-related changes in steroid-converting enzyme activities in Squalus testis: synthesis of biologically active metabolites via 3 beta-hydroxysteroid dehydrogenase/isomerase and 5 alpha-reductase. Steroids 58:87-94
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Dubois, W; Callard, G V (1993) Culture of intact Sertoli/germ cell units and isolated Sertoli cells from Squalus testis. II. Stimulatory effects of insulin and IGF-I on DNA synthesis in premeiotic stages. J Exp Zool 267:233-44
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Cuevas, M E; Miller, W; Callard, G (1992) Sulfoconjugation of steroids and the vascular pathway of communication in dogfish testis. J Exp Zool 264:119-29
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Callard, G V (1992) Autocrine and paracrine role of steroids during spermatogenesis: studies in Squalus acanthias and Necturus maculosus. J Exp Zool 261:132-42
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Cuevas, M E; Callard, G (1992) In vitro steroid secretion by staged spermatocysts (Sertoli/germ cell units) of dogfish (Squalus acanthias) testis. Gen Comp Endocrinol 88:151-65
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Singh, S; Callard, G (1992) Identification of an androgen receptor in the zonal testis of the salamander (Necturus maculosus). Gen Comp Endocrinol 86:220-30
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Cuevas, M E; Callard, G (1992) Androgen and progesterone receptors in shark (Squalus) testis: characteristics and stage-related distribution. Endocrinology 130:2173-82
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Showing the most recent 10 out of 22 publications
