bioinformatics introduction links:
2. http://bioinfo.mbb.yale.edu/mbb452a/intro/
3. http://www.sdsc.edu/~helgew/bioinform/winter2002/lecture1.html
4. http://bioinformatics.weizmann.ac.il/cards/bioinfo_intro.html
5. http://www-biology.ucsd.edu/others/dsmith/bioinformatics.html