7.2 Codon-anticodon recognition involves wobbling Wobble hypothesis accounts for the ability of a trna to recognize more than one codon by unusual (non-G C non-a T) pairing with the third base of a codon 消当
Wobble hypothesis accounts for the ability of a tRNA to recognize more than one codon by unusual (non-G C, non-A T) pairing with the third base of a codon. 7.2 Codon-anticodon recognition involves wobbling
7.2 Codon-anticodon recognition involves wobbling UUU UCU UUC UCC UAC JGC UUA UCA UGA UUG UCG UAG UGG CCU CAU CGU CUC CCC CGC Figure 7.3 Third bases CAA CGA CUG CCG CAG CGG have the least influence A儿U ACU 凸凸 AGU AUC ACC AAC AGC on codon meanings AUA ACA AAA AGA AUG AGG Boxes indicate groups GUU GCU GAU GGU GUC GCC GGC GUA GCA of codons within which GGA GUG GCG GAG GGG third-base degeneracy Third base relation ship Third bases Number with same of codons ensures that the meaning meaning is the same third base irrelev ant U,C, A,G 32 purines differ rom pyrimidines Aor G 10 unique U CA definitions n 消当
Figure 7.3 Third bases have the least influence on codon meanings. Boxes indicate groups of codons within which third-base degeneracy ensures that the meaning is the same. 7.2 Codon-anticodon recognition involves wobbling
Standard base pairs occur at all positions 7.2 Codon-anticodon recognition involves wobbling Cytosine H Guanine Figure 7. 4 Wobble in base pairing allows G-U Uracil pairs to form between Adenine the third base of the G-U wobble pairing occurs only at third codon position codon andand the first base of the anticodon 消当
Figure 7.4 Wobble in base pairing allows G-U pairs to form between the third base of the codon and and the first base of the anticodon. 7.2 Codon-anticodon recognition involves wobbling
7.2 Codon-anticodon recognition involves wobbling Base in First Base(s)Recognized Position of in Third position of Anticodon Codon A or G CAG G only U only r Figure 7.5 Codon-anticodon pairing involves wobbling at the third position 消当
Figure 7.5 Codon-anticodon pairing involves wobbling at the third position. 7.2 Codon-anticodon recognition involves wobbling
7.3 tRNA contains modified bases that influence its pairing properties Modification of dna or rna includes all changes made to the nucleotides after their initial incorporation into the polynucleotide chain 消当
Modification of DNA or RNA includes all changes made to the nucleotides after their initial incorporation into the polynucleotide chain. 7.3 tRNA contains modified bases that influence its pairing properties