Chemistr Y: Pa Uling and Corey the Pol Ypeptide-chain Configuration in Hemoglobin and Other Globular Proteins
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Chemistry: Pa Uling and Corey the Structure of Synthetic Polypeptides by Linus Pauling
In a preliminary communication last year' we stated that there are only two helical configurations of polypeptide chains in which the residues are all equivalent and intramolecular hydrogen bonds are formed, and in which the interatomic distances, bond angles, and other structural features, especially the coplanarity of the conjugated amide system, are as required by earlier work in these Labor...
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Collagen is a very interesting protein. It has well-defined mechanical properties (great strength, reversible extensibility through only a small range) that make it suited to the special purposes to which it is put in the animal body, as in tendon, bone, tusk, skin, the cornea of the eye, intestinal tissue, and probably rather extensively in reticular structures of cells. During the last thirty...
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by an increase in protein content, while the amount of desoxyribonucleic acid remains unchanged. Acknowledgments.-This work was supported by research grants from the University of California Board of Research. We are greatly indebted to Professor A. W. Pollister, Dept. of Zoology, Columbia University, for allowing the senior author use of his laboratory facilities to conduct the measurements de...
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ILOnsager, L., Physik. Z., 28, 277 (1927); Onsager, L., and Fuoss, R. M., J. Phys. Chem., 36, 2689 (1932); Fuoss, R. M., Physik. Z., 35, 59 (1935). 2 Shedlovsky, T., J. Am. Chem. Soc., 54, 405 (1932). 3 Shedlovsky, T., Brown, A. S., and Maclnnes, D. A., Trans. Electrochem. Soc., 66, 165 (1934); Benson, G. C., and Gordon, A. R., J. Chem. Phys., 13, 473 (1948); Monk, C. S., J. Am. Chem. Soc., 70,...
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ess was impracticable but it appeared to be possible to extract a small quantity of neodymium which was present in praseodymium. Accordingly, we selected a mixture which was composed of 94 per cent praseodymium and 6 per cent neodymium and extracted the latter with ether. The .residue contained such a small quantity of neodymium that it could not be detected by spectroscopic means and we believ...
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