IgBLAST is a tool commonly used in bioinformatics. IgBLAST (Immunoglobulin BLAST) is designed for the analysis of immunoglobulin (IG) and T cell receptor (TCR) sequences. It's part of the suite of tools offered by the National Center for Biotechnology Information (NCBI).

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The Basic Local Alignment Search Tool (BLAST) finds regions of local similarity between sequences. The program compares nucleotide or protein sequences to sequence databases and calculates the statistical significance of matches. BLAST can be used to infer functional and evolutionary relationships between sequences as well as help identify members of gene families.

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