Perl

I am proficient in Perl and have written about 10,000 lines of Perl code (Perl scripts and object-oriented Perl modules) as a programmer for the Protein Data Bank (PDB):

• An example of Perl modules is a library of parsing tools for mmCIF (macromolecular Crystallographic Information File), an evolving standard in structural bioinformatics. (More information on mmCIF can be found on these PDB or NDB pages.)
• An example of a Perl script is a utility to download all PDB files associated with a particular PDB update date. Here's the script and the documentation.
• Another example of a fairly substantial Perl script is from the PDB's data uniformity project. It attempts to find a consensus of Swiss-Prot-related information for each protein chain in the PDB. Here's the script and an excerpt of output.

I am maintaining about 40,000 lines of Perl and Perl/CGI code as part of the current PDB query and distribution software.