BIO 1140 Lecture Notes - Start Codon, Transfer Rna, Ribosome
17 Jul 2014
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Ef or eef) and energy supplied by gtp. The players in translation: genetic code: dna, three-letter code: triplet, rna, three-letter code: codon, a three-letter code with 4 bases allows 64 combinations, more than enough for. Genetic code: conventions by convention sequences are always written from 5" to 3". the codon in dna is written the same as the codon in rna, except that t becomes u. Start codon or initiator codon: first amino acid recognized during translation, specifies amino acid methionine , establishes the reading frame. 61 codons specify amino acids: most amino acids specified by several codons (degeneracy or redundancy, ex: ccu, ccc, cca, ccg all specify proline. Stop codons or termination codons (sometimes nonsense : end of a polypeptide-encoding mrna sequence, uaa, uag, uga (sometimes referred to as ochre , amber and opal ; the names relate to their discovery in mutations) conservative change:
