Hi funky monk,

Thanks for your idea but i didn't get how to put other elements t.e other than NOT in array.? 

$_ = '((transcription AND factor)NOT(control OR regulat) AND (TATA OR 
+TBP) NOT (BLOOD AND marrow))';

my @caps =  m/NOT   # "NOT"
              \s*   # spaces?
              (     # start capturing
              \(    # "("
              [^)]+ # some not ")"s
              \)    # ")"
              )     # end capture
             /xg;

print join "\n", @caps;

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In reply to Re:regular expression by funky monk by Archana
in thread Regular expreesion for extraction of words by Archana

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