NCBI News: Spring 2004|RefSeq Accession Numbers Get Longer

	Transitioning from LocusLink to Entrez Gene Cancer Chromosomes: a New Entrez Database HomoloGene: An Entrez Database with a New Look BLAST Link (BLink) to Protein Alignments and Structures Debut of the HCT Database and Anthropology/Allele Frequencies in dbMHC 350kb Sequence Length Limit Removed by Sequence Database Collaboration New Eukaryotic Genomes at NCBI Environmental Samples Make Big Splash HIV Protein-Interaction Database e-PCR and Reverse e-PCR: Greater Sensitivity, More Options New Organisms in UniGene RefSeq Accession Numbers Get Longer as Rat Gets Last 6-digit Accession Slots available for FieldGuidePlus Training Course Onsite at NCBI RefSeq Release 6 on FTP Site Exponential Growth of GenBank Continues with Release 142 Entrez Tools is a 'Hot Spot' BLAST Lab: Using BLASTClust New Microbial Genomes in GenBank Entrez Quiz Masthead		RefSeq Accession Numbers Get Longer as Rat Gets Last 6-digit Accession Rattus norvegicus has scurried to the end of the possibilities offered by the six digit RefSeq accession format by making off with NCBI protein RefSeq accession NP_999999, required for its olfactory receptor Olr1386. To compensate, RefSeq accessions have now been extended to a length of 9 digits, e.g., NP_123456789. Preexisting accessions will not be changed and accession numbers in both the old and new extended formats, such as NM_000100 and NM_01000000, will coexist. Are you wondering which organism got the first 9-digit RefSeq protein accession? That would be the energetic and inquisitive Rattus norvegicus again, for another of its very important olfactory receptors!