Biology 1201A Chapter Notes - Chapter 13: Neurospora Crassa, Precursor Mrna, Stop Codon
15 Jul 2015
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Why it matters: mussel: keratin: intermediate filament protein & other proteins - > byssus, protein: assembled on ribosomes according to instructions dictated by genes coded in dna. Arginine pathway- precursor - > ornithine - > citulline - > arginosuccinate - > arginine. One gene-one enzyme hypothesis - > gene-one-polypeptide hypothesis. 2: eukaryote: precursor mrna - > translatable mrna - > exits nucleus through nuclear pore - > translated on ribosomes in cytoplasm, prokaryote: mrna immediately available for translation on ribosomes, fig. Prokaryotes: rna polymerase ii cannot bind directly to. 291: no complementary base-pairing w/ template is needed for particular type of rna synthesis; no poly(t) sequence in dna corresponding to poly(a) sequence in pre-mrna. Interactions depend on specific structural form on tropomyosin; i. e. smooth muscles=squeezing actions: exon shuffling: existing protein regions/domains, already selected due to useful functions, are mixed into novel combinations - > create new proteins. Anti-codon & codon pair in antiparallel manner - > 5"3 direction.
