A busy life is a wasted life.

One can say, looking at the papers in this symposium, that the elucidation of the genetic code is indeed a great achievement. It is, in a sense, the key to molecular biology because it shows how the great polymer languages, the nucleic acid language and the protein language, are linked together.

For simplicity one can think of the + class as having one extra base at some point or other in the genetic message and the - class as having one too few.

The balance of evidence both from the cell-free system and from the study of mutation, suggests that this does not occur at random, and that triplets coding the same amino acid may well be rather similar.

The dangerous man is the one who has only one idea, because then he'll fight and die for it.

Chance is the only source of true novelty.

A final proof of our ideas can only be obtained by detailed studies on the alterations produced in the amino acid sequence of a protein by mutations of the type discussed here.