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30-Nov-2020 12:25

He was quoted as saying that he had discovered the basis of the method in 1968, and that it was so obvious and simple he was amazed it hadn't been discovered earlier.As a matter of fact, the basis of this method had been discovered earlier and had been reported in a series of papers published by Hare, Mitterer and Abelson in 1967, 1968, and 1969.The rates obtained at these temperatures were extrapolated to 2° C and to 4° C, the present average temperatures where the deep-sea cores containing the sediment samples were obtained.These data are believed to yield the rates at which L-isoleucine was converted to Dalloisoleucine in the sediment through geological time.The two forms are known as L-amino acids and D-amino acids, the L and D designating the direction in which solutions of these amino acids rotate plane-polarized light.They are mirror-images of each other, and one cannot be superimposed on the other, just as is true of left and right hands.

Two of these amino acids, isoleucine and threonine, are commonly found in most proteins.

The amino acids combine with each other like the links of a chain to form a long protein chain.