Thanks for the helpful technique. I learn something new. I have a question related to this technique. How can I do case insensitive comparison to tag protein name? If my sentence contains the name in the protein name list, but with different case, then I cannot find the matching. 
my $sentence = 'The DOC4 protein , stress-induced flibbled the woozle 
+in the presence of gonadotrophin alpha 2 subunit';

__DATA__
gonadotrophin
gonadotrophin alpha 2 subunit
Doc4 protein , stress-induced

[download]
Desired output: 
The **DOC4 protein , stress-induced** flibbled the woozle in the prese
+nce of **gonadotrophin alpha 2 subunit**

[download]
It should match the longest protein name first, once the name is matched, we can ignore the matched protein name, and move on to next word. Thanks for any suggestion!

In reply to Re^3: Tag protein names in sentences by Anonymous Monk
in thread Tag protein names in sentences by sinlam

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.