Related quotes

• If poly A is added to poly U, to form a double or triple helix, the combination is inactive. — Francis Crick
• 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. — Francis Crick
• Do codons overlap? In other words, as we read along the genetic message do we find a base which is a member of two or more codons? It now seems fairly certain that codons do not overlap. — Francis Crick
• Unfortunately it makes the unambiguous determination of triplets by these methods much more difficult than would be the case if there were only one triplet for each amino acid. — Francis Crick
• 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. — Francis Crick
• It has yet to be shown by direct biochemical methods, as opposed to the indirect genetic evidence mentioned earlier, that the code is indeed a triplet code. — Francis Crick