Calculates the aliphatic index of amino acid sequences
aliphatic calculates the aliphatic index of amino acid sequences using
the method of Ikai. Non-informative positions are excluded, where non-informative
is defined as any character in
c("X", "-", ".", "*").
vector of strings containing amino acid sequences.
A vector of the aliphatic indices for the sequence(s).
Ikai AJ. Thermostability and aliphatic index of globular proteins. J Biochem. 88, 1895-1898 (1980).
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