RefSeq Scope and Accessions

Different record types for different molecules from the central dogma of biology:

• Genomic DNA
• NC_123456 - complete genome, complete chromosome, complete plasmid
• NG_123456 - genomic region
• NT_123456 - genomic contig
• mRNA - NM_123456
• Protein - NP_123456
• Gene and protein models from genome annotation projects:
• XM_123456 - mRNA
• XR_123456 - RNA (non-coding transcripts)
• XP_123456 - protein
• more about RefSeq scope and accessions...