Abstract Background Sequence comparisons make use of a one-letter representation for amino acids. the necessary quantitative information being supplied by the substitution matrices. This paper deals with the problem of finding a representation that provides a comprehensive description of amino acid intrinsic properties consistent with the substitution matrices. Results We present a Eu... https://www.roneverhart.com/Super-Sensitive-SS2102-Red-Label-1-8-Violin-String-Set-p28087/