Gene Activity in Early DevelopmentIntroduction: the variable gene activity theory of cell differentiation; The onset of genome control in embryogenesis; First indices of differential embryo cell function; Quantitative aspects of protein synthesis in early embryos: the role of maternal components; Transcription in early embryos; RNA sequence complexity and structural gene transcription in early embryos; Localization of morphogenetic determinants in egg cytoplasm; Lampbrush chromosomes and the synthesis of heterogeneous nuclear and messenger RNA's during oogenesis. |
Contents
DNA Constancy and Nuclear Transplantation | 5 |
Direct Evidence for the Variable Gene Activity Theory | 11 |
The Onset of Genome Control in Embryogenesis | 27 |
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accumulated acid activity amount amphibian appear Biol blastomeres blastula calculated carried cells changes Chapter cleavage complexity constant contains cytoplasm Davidson determinants differentiation early effect equation et al evidence example exist experiments fertilization fraction fragments function gastrula genes genome germ cell heterogeneous histone hybridization incorporation increase isolated kinetics known labeled lampbrush chromosomes later least length localization loops maternal messenger mature measured messenger RNA newly synthesized normal nuclear RNA nuclei nucleotides nurse observed obtained occurs oocyte oogenesis organisms patterns period polar lobe poly(A polysomal pool present produce protein synthesis quantity reaction region relatively remains renaturation repetitive sequence reported represent result reviewed ribosomal RNA synthesis RNA's sea urchin embryos showed shown shown in Fig similar single copy species stage studies synthesis rate Table teleost tion transcribed transcripts translated various Xenopus