Enter accession number (s), gi (s), or FASTA sequence (s) Help Clear. The program compares nucleotide or protein sequences to. Click on the first instance of a 'gene' label in this feature table. Enter a descriptive title for your BLAST search Help. The Basic Local Alignment Search Tool (BLAST) finds regions of local similarity between sequences. In the feature table, each labeled feature is hyperlinked to the sequence itself, which is at the bottom of the record. A gene may include multiple sections of coding sequences, so the same nucleotide sequence (shown in a number range) may be labeled as CDS and gene. CDS = a coding sequence, or region of nucleotides that corresponds with amino acids in a protein.There are several types of BLAST searches. BLAST can be used to infer functional and evolutionary relationships between sequences as well as help identify members of gene families. Definitions of some of the feature labels can be found in the GenBank Sample Record. The program compares nucleotide or protein sequences and calculates the statistical significance of matches. Optimize for Highly similar sequences (megablast) Optimize for More dissimilar sequences (discontiguous megablast) Optimize for Somewhat similar sequences (blastn) Choose a BLAST algorithm Help. Scroll down the feature table of this mitochondrial DNA record. Enter an Entrez query to limit search Help. A record may include nomenclature, Reference Sequences (RefSeqs), maps, pathways, variations, phenotypes, and links to genome-, phenotype-, and locus-specific resources worldwide.

An interesting part of a Nucleotide record is the section labeled 'FEATURES.' Called the 'feature table,' this is the part that reflects scientists' annotations - notes on what biological features of interest are known about a sequence. Gene integrates information from a wide range of species. The Nucleotide database is a collection of sequences from several sources, including GenBank, RefSeq, TPA and PDB.

Ncbi nucleotide