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Practice question

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Question

Calculate the percentage sequence identity for the pairwise alignment given below. _______ H E L L O – Y E L L O W

Explanation

Alignment HELLO- vs YELLOW shows 4 identical positions E,L,L,O out of 6 columns =66.7% identity. If gaps excluded, 4/5=80% matches among residues. Identity measures exact matches, differing from similarity that allows conservative substitutions in bioinformatics scoring.

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