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Mystery of the Genetic Code

Inouye M

There are a total of 64 genetic codons assigned to the 20 amino acids and termination codons. The fact that all living organisms share the same codon assignment for individual amino acids indicates that all living organisms on the earth originated from the same organism. Mysteriously, however, the number of codons for individual amino acids does not necessarily correlate to amino acid usages in currently living organisms. In this article, I will discuss this mystery of the genetic code.