THEORETICAL CONSIDERATION OF THE RELATION BETWEEN HYDROGEN BOND TYPES AND POSSIBLE SECONDARY STRUCTURES OF A POLYPEPTIDE CHAIN

摘要

An extended set of ''secondary structures'', which are defined as systems consisting of the maximum possible number of cooperative units, is considered. The classical and non-classical secondary structures are systematized in a new way. Although it is not assumed that L-stereoisomers of amino acids are preferred in nature, it is shown that such preferences could be imposed when possibilities of spatial rebuilding of the polypeptide chain are limited during a synthesis process. (C) 1995 Academic Press Limited [References: 17]