. Biophysical science. Biophysics. 272 X-ray Analyses of Proteins and Nucleic Acids /15 : 2. where R is either H or any of a number of different organic radicals. This form is called an a-amino acid. If one makes a three-dimensional model of such an a-amino acid, there are two steric arrangements of the a carbon which cannot be CH2OH 6 C—H I 5 H—C—OH 4 HO—C—H 3 H—C—OH 2 H—C—OH 1 H—C—OH I H 1(a) Straight-chain d-glucose. H/5~ -o ^H \OH H HO\^ _2W OH HOCH 5 0\ H \QU H/i h12 i H OH t Oh I ! i H OH H 1(b) 1(c) 1(d) (X-pyranose ring, d-glucose fi-pyranose ring, d-glucose ffranose ring


. Biophysical science. Biophysics. 272 X-ray Analyses of Proteins and Nucleic Acids /15 : 2. where R is either H or any of a number of different organic radicals. This form is called an a-amino acid. If one makes a three-dimensional model of such an a-amino acid, there are two steric arrangements of the a carbon which cannot be CH2OH 6 C—H I 5 H—C—OH 4 HO—C—H 3 H—C—OH 2 H—C—OH 1 H—C—OH I H 1(a) Straight-chain d-glucose. H/5~ -o ^H \OH H HO\^ _2W OH HOCH 5 0\ H \QU H/i h12 i H OH t Oh I ! i H OH H 1(b) 1(c) 1(d) (X-pyranose ring, d-glucose fi-pyranose ring, d-glucose ffranose ring, d-glucose CH2OH °\CH2OH HO. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ackerman, Eugene, 1920-. Englewood Cliffs, N. J. , Prentice-Hall


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