Input 'xxxxxxxGNNNxxxxxxxNNNGYGYxxxxxxxGYGYNNNxxxxxxxNNNGNNNxxxxxxx' gives: 
NNGYGY begins at position 19
GYGYNN begins at position 32
NNGN begins at position 47

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rather than

GNN begins at position 7       <---
NNGYGY begins at position 19
GYGYNN begins at position 32
NNGNN begins at position 47    <---

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In reply to Re^2: Perl regular expression for amino acid sequence by ikegami
in thread Perl regular expression for amino acid sequence by seaver

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