Vibrational states of the biopolymer polyglycine II: theory and experiment

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Science  31 Oct 1975:
Vol. 190, Issue 4213, pp. 458-460
DOI: 10.1126/science.1166312


The density of vibrational states, and hence the heat capacity, has been calculated for the parallel-chain hexagonal lattice of 3(1) helical polyglycine. The agreement with experimental results in the temperature range from 1 to 20 K, including an anomaly near 8 K, is the best obtained thus far for homopolypeptides.