EVIDENCE FOR SYNTHESIS OF DEOXYRIBONUCLEIC ACID IN ENUCLEATED RANA PIPIENS EGGS
نویسندگان
چکیده
منابع مشابه
Evidence for Synthesis of Deoxyribonucleic Acid in Enucleated Rana Pipiens Eggs
The large quanti ty of DNA found in the cytoplasm of some eggs raises the question of whether DNA can be synthesized outside the nucleus. Data on the Rana pipiens egg were obtained some time ago and were first ment ioned in a paper by Schultz in 1956 (1). In the enucleated egg of this species, DNA, or a DNA-like molecule, doubles in amount in the first 30 hours after activation. Since the amoun...
متن کاملThe initiation of protein synthesis in eggs of rana pipiens.
During amphibian o6genesis, small o6cytes in the first meiotic prophase undergo a prolonged growth period resulting in the formation of fully developed o6cytes which have greatly increased in size. The injection of a pituitary suspension into mature females stimulates the release of the full-grown o6cytes from the ovary and the breakdown of their large nuclei (germinal vesicles). The ovulated e...
متن کاملTransplantation of Living Nuclei of Late Gastrulae into Enucleated Eggs of Rana pipiens
I N previous papers it has been shown that living nuclei of animal hemisphere cells of frog blastulae and early gastrulae can be transferred into enucleated eggs (Briggs & King, 1952,1953a). Approximately 20 per cent, to 40 per cent, of the recipient eggs cleave normally, and the majority of these develop into complete embryos, demonstrating that the transplanted nuclei are undifferentiated (i....
متن کاملEffects of acid stress in adult Rana pipiens.
The decline in frog populations is a well-recognized worldwide phenomenon and infectious disease has been implicated as a major cause in the global decline of amphibian populations. Rana pipiens are disappearing from many habitats where they used to flourish, and environmental acidification has been considered as a possible contributor to this disappearance. We present a model that integrates t...
متن کاملAcid exposure is an immune disruptor in adult Rana pipiens.
Acidic environments are physiological stressors for amphibians. The objective of the present study was to document the effect of an acidic environment on innate immune system function under controlled experimental conditions in Rana pipiens. We developed an in vivo assay, by injecting a suspension of 1-microm fluorescent beads in fluid thioglycollate, to induce peritonitis. The number of perito...
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ژورنال
عنوان ژورنال: Journal of Cell Biology
سال: 1963
ISSN: 1540-8140,0021-9525
DOI: 10.1083/jcb.18.2.471