Glossary ======== .. role:: underline :class: underline .. role:: emphasis :class: emphasis .. rubric:: Glossary of Terms :class: header1 :Authors: Justin R. DiAngelo, Alexis Nagengast, Wilson Leung :Last Update: |today| :Version: |version| .. glossary:: BLAST :emphasis:`B`\ asic :emphasis:`L`\ ocal :emphasis:`A`\ lignment :emphasis:`S`\ earch :emphasis:`T`\ ool is a tool for identifying sequence similarities Conservative Substitution Mutation A change of a nucleotide in a gene coding sequence that changes the amino acid encode to one with similar biochemical properties. Database In the context of bioinformatics, a collection of DNA or protein sequences that can be searched for information similar to a query sequence. FASTA A text-based format for representing either nucleotide sequences or amino acid (protein) sequences. Gene A segment of a chromosome coding for a protein or RNA. Homologs Genes of similar sequences related by common evolutionary origin. Mutation A change of a nucleotide in a DNA sequence relative to an ancestral sequence. Types include point mutations, duplications, deletions. NCBI National Center for Biotechnology Information (NCBI) is a public database that houses molecular biology information including sequences from thousands of different species from mammals to fungi. Plus (+) Strand The top nucleotides that read left to right, 5' to 3' on a genome browser RefSeq The NCBI Reference Sequence Database (RefSeq) is a comprehensive, curated database of non-redundant sequence records.