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"It is one of the more striking generalizations of biochemistry - which surprisingly is hardly ever mentioned in the biochemical textbooks - that the twenty amino acids and the four bases, are, with minor reservations, the same throughout Nature."
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"If you will stay close to nature, to its simplicity, to the small things hardly noticeable, those things can unexpectedly become great and immeasurable."
"Flowers are the beautiful hairs of the Mother Spring! Don't pluck them!"
"Men are by nature merely indifferent to one another; but women are by nature enemies."
"Sometimes, humanity surprises me with all its lack of control over the primordial urges. These innate urges are the biological traits that make us similar to the rest of the animal kingdom. But the modern qualities that make us superior to all the animals are intellect and self-control."
"Retaliation is related to nature and instinct, not to law. Law, by definition, cannot obey the same rules as nature."
"The Moon always finds an opportunity to turn our attention from the ground beneath our feet to the sky above our head!"
"Everything in Nature contains all the powers of Nature. Everything is made of one hidden stuff."
"I have resolved on an enterprise that has no precedent and will have no imitator. I want to set before my fellow human beings a man in every way true to nature; and that man will be myself."
Explore more quotes by Francis Crick
"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."
"It now seems very likely that many of the 64 triplets, possibly most of them, may code one amino acid or another, and that in general several distinct triplets may code one amino acid."
"It seems likely that most if not all the genetic information in any organism is carried by nucleic acid - usually by DNA, although certain small viruses use RNA as their genetic material."
"The meaning of this observation is unclear, but it raises the unfortunate possibility of ambiguous triplets; that is, triplets which may code more than one amino acid. However one would certainly expect such triplets to be in a minority."
"Attempts have been made from a study of the changes produced by mutation to obtain the relative order of the bases within various triplets, but my own view is that these are premature until there is more extensive and more reliable data on the composition of the triplets."
"It would appear that the number of nonsense triplets is rather low, since we only occasionally come across them. However this conclusion is less secure than our other deductions about the general nature of the genetic code."
"It now seems certain that the amino acid sequence of any protein is determined by the sequence of bases in some region of a particular nucleic acid molecule."
"A comparison between the triplets tentatively deduced by these methods with the changes in amino acid sequence produced by mutation shows a fair measure of agreement."
"We are sometimes asked what the result would be if we put four +'s in one gene. To answer this my colleagues have recently put together not merely four but six +'s."
"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."
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