NCBI-BLAST2 - Protein Database Query

BLAST stands for Basic Local Alignment Search Tool.The emphasis of this tool is to find regions of sequence similarity, which will yield functional and evolutionary clues about the structure and function of your novel sequence. WU-BLAST 2.0 and NCBI BLAST2 are distinctly different software packages, although they have a common lineage for some portions of their code, so the two packages do their work differently and obtain different results and offer different features. You can also check for vector contamination with BLAST2 EVEC.