Introduction of PIR-RESID Database (http://www-nbrf.georgetown.edu/pirwww/dbinfo/resid.html)

It is a database of protein post-translational modifications. It provide informations as:

˙A list of alternate names and an IUPAC systematic chemical name.

˙The coding, sequences and structures of proteins.

˙Comparison between proteins.

˙The activity-structures relationship.

˙More.

Introduction of BLAST (http://www.ncbi.nlm.nih.gov/BLAST/blast_overview.html)

BLAST is set of similarity search programs designed by NCBI. It provides the informations available even if the query is DNA or proteins. Thus it is not only a searching tools for single DNA nor protein sequence. In this website, it offers the teaching of BLAST and accesses for BLAST.