Bioinformatic Exam 1. (a) Why and when should you prefer PSI–BLAST over blastp? (b) Why e–values differ in PSI–BLAST from first search to second iteration? (c) What does PSSM stand for? Which BLAST search program uses the PSSM? (d) In what situation one needs to verify two putative homologs using pairwise alignment and why? 2. […]