Basic Examples (1) 

Convert a DNA strand with degenerate letters to an equivalent regular expression:

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Scope (2) 

A biomolecular sequence with degenerate letters:

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Convert it to a regular expression:

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The regular expression can be used in string functions like StringCases:

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This is equivalent to using StringCases directly on BioSequence objects:

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Convert a peptide sequence with degenerate letters:

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Options (2) 

IncludeDegenerateLetters (2) 

With the setting "IncludeDegenerateLetters"→True, BioSequenceToRegularExpression includes degenerate letters in the regular expression returned:

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With the setting "IncludeDegenerateLetters"→False, degenerate letters are excluded:

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Possible Issues (2) 

If the input biomolecular sequence does not contain degenerate letters, BioSequenceToRegularExpression returns a trivial regular expression:

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Hybrid strands and sequence collections are not supported:

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