Although amino acids are often shown in textbooks as the right-hand structure, they actually mostly exist as the left-hand structure. This table shows the abbreviations and single letter codes used ...

Was it a continuous code, or were there "commas" (spare nucleotides) between codons that served as signals for the next amino acid (Table 1)? These questions were answered by way of several ...

Degeneracy of the Amino Acid Code Examination of the full table of codons enables one to immediately determine whether the "extra" codons are associated with redundancy or dead-end codes (Figure 3).