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
Attractive Amino Acids quotations
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.
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.
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.
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.
If one compares the sequence of amino acids that go to form the protein haemoglobin, it becomes apparent that humans and chimps are identical and do not differ in a single site.
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.
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.
Back in the day I took a lot of supplements and tons of amino acids.
Still do. But back then it was pretty unusual. That's how I got the nickname The Chemist.
The mission of DNA is to evolve nervous systems able to escape from the doomed planet and contact manifestations of the same amino-acid seeding that have evolved in other solar systems. The mission is the message--to escape and come home.
It will be possible, through the detailed determination of amino-acid sequences of hemoglobin molecules and of other molecules too, to obtain much information about the course of the evolutionary process, and to illuminate the question of the origin of species.
I go to a poison registry and I find that no one has died from any overdose of any vitamins, herbs, or amino acids... But FIVE THOUSAND people end up dying from drug reactions in a single year.
The basic structure of proteins is quite simple: they are formed by hooking together in a chain discrete subunits called amino acids.
This seems highly likely, especially as it has been shown that in several systems mutations affecting the same amino acid are extremely near together on the genetic map.
Self awareness is NOT just a bunch of amino acids bumping together.
One amino acid does not a protein make-let alone a being.
Part of my daily regime is my glucosamine and, of course, a multitude of multivitamins. Branched-chain amino acids, glutamine, of course protein. I have one protein shake a day, and that is immediately after my training.
People crave laughter as if it were an essential amino acid.
There's a new science out called orthomolecular medicine.
You correct the chemical imbalance with amino acids and vitamins and minerals that are naturally in the body.
But all the vitamins, amino acids, protein etc.
needed to get stronger can be found in abundance in plant foods. Anything that is a fruit, nut, grain or seed is vegan and there are thousands of those.
If you have a universe that was just the mirror image of the one we know about, then in fact, presumably it would have right-handed amino acids. That's why I'm only half kidding when I say there is a guy on the other side of the universe with his heart on the right hand side.
An amino acid residue (other than glycine) has no symmetry elements.
The general operation of conversion of one residue of a single chain into a second residue equivalent to the first is accordingly a rotation about an axis accompanied by translation along the axis. Hence the only configurations for a chain compatible with our postulate of equivalence of the residues are helical configurations.
You see, proteins, as I probably needn't tell you, are immensely complicated groupings of amino acids and certain other specialized compounds, arranged in intricate three-dimensional patterns that are as unstable as sunbeams on a cloudy day. It is this instability that is life, since it is forever changing its position in an effort to maintain its identity--in the manner of a long rod balanced on an acrobat's nose.