BIOL 3010 Lecture Notes - Lecture 10: Hydrolysis, Methionine, Transfer Rna
16 Sep 2016
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1 codon= 3 nucleotides -> 1 aa: degenerate (redundant) more than one codon codes for an aa. 4^3 = 64 different triplets , but only 20 amino acids in theory only need 20 triplets but we got an excess. 3 stop codons: know them!! trna anti codon sequence: If not labeled it will be the exact opposite, some will be labeled a little different for example, gly can be coded by the codon with any of the 4 nucleotides in the 3rd position. ***codon table will be given for test: inspite that its redundant, its unambiguous no codon specifies for more than one amino acid, nonoverlapping. 120+60+180- 60-120= 180-3(stop codon) = 177 nucleotide bases long, divided by 3= 59 amino acids trna jobs: pick up aa match with correct codon. Secondary structure: intrastrand, folds to get base pairing, cloverleaf. Aminoacyl-trna synthetase: synthetase names vary for each amino acid- Methionine: the anticodon is very accurate because only one codon.
