关于RefSeq的基本信息，可以参照一下几篇文章【开启传送门~！@#￥%……&*】
http://www.biosino.org/pages/ncbi-10.htm
官方版本：http://www.ncbi.nlm.nih.gov/RefSeq/RSfaq.html
不过可能我现在更关注与RefSeq的格式说明，这一阶段的失败教训提醒我，数据分析的时候一定要搞清楚各个数据项的意义。
方便查阅
Accession @
| AC_123456 | Genomic | Mixed | Alternate complete genomic molecule. This prefix is used for records that are provided to reflect an alternate assembly or annotation. Primarily used for viral, prokaryotic records. | 基因组序列，主要是病毒、原核生物。 |
| AP_123456 | Protein | Mixed | Protein products; alternate protein record. This prefix is used for records that are provided to reflect an alternate assembly or annotation. The AP_ prefix was originally designated for bacterial proteins but this usage was changed. | 蛋白序列，AP_原本只用于细菌的蛋白。 |
| NC_123456 | Genomic | Mixed | Complete genomic molecules including genomes, chromosomes, organelles, plasmids. | 全基因组序列，包括细胞器的、质粒等 |
| NG_123456 | Genomic | Mixed | Incomplete genomic region; supplied to support the NCBI genome annotation pipeline. Represents either non-transcribed pseudogenes, or larger regions representing a gene cluster that is difficult to annotate via automatic methods. | 不完整的基因组序列， |
| NM_123456 NM_123456789 |
mRNA | Mixed | Transcript products; mature messenger RNA (mRNA) transcripts. | 成熟的mRNA |
| NP_123456 NP_123456789 |
Protein | Mixed | Protein products; primarily full-length precursor products but may include some partial proteins and mature peptide products. | 全长蛋白序列。但也有可能包括非全长的蛋白或成熟的多肽序列。 |
| NR_123456 | RNA | Mixed | Non-coding transcripts including structural RNAs, transcribed pseudogenes, and others. | 不编码的RNA，假基因或其它 |
| NT_123456 | Genomic | Automated | Intermediate genomic assemblies of BAC and/or Whole Genome Shotgun sequence data. | BAC法或鸟枪法得到的基因组序列 |
| NW_123456 NW_123456789 |
Genomic | Automated | Intermediate genomic assemblies of BAC or Whole Genome Shotgun sequence data. | BAC法或鸟枪法得到的基因组序列 |
| NZ_ABCD12345678 | Genomic | Automated | A collection of whole genome shotgun sequence data for a project. Accessions are not tracked between releases. The first four characters following the underscore (e.g. 'ABCD') identifies a genome project. | 'ABCD'代表的是具体的基因组计划 |
| XM_123456 XM_123456789 |
mRNA | Automated | Transcript products; model mRNA provided by a genome annotation process; sequence corresponds to the genomic contig. | 转录序列 |
| XP_123456 XP_123456789 |
Protein | Automated | Protein products; model proteins provided by a genome annotation process; sequence corresponds to the genomic contig. | 蛋白序列 |
| XR_123456 | RNA | Automated | Transcript products; model non-coding transcripts provided by a genome annotation process; sequence corresponds to the genomic contig. | 不编码的转录序列， |
| YP_123456 YP_123456789 |
Protein | Mixed | Protein products; no corresponding transcript record provided. Primarily used for bacterial, viral, and mitochondrial records. | 蛋白序列，没有对应的转录序列。用于细菌、病毒和线粒体 |
| ZP_12345678 | Protein | Automated | Protein products; annotated on NZ_ accessions (often via computational methods). | 蛋白序列。来自对应的NZ_开头的核酸序列。 |
| NS_123456 | Genomic | Automated | Genomic records that represent an assembly which does not reflect the structure of a real biological molecule. The assembly may represent an unordered assembly of unplaced scaffolds, or it may represent an assembly of DNA sequences generated from a biological sample that may not represent a single organism. | 比较复杂 |
@ Method:
Mixed: indicates the process flow includes both automated processing and expert review for some of the records; curation analysis may be provided either by NCBI staff or collaborators.由专家手动检查过的
Automated: indicates records that are not individually reviewed; updates are released in bulk for a genome.自动注释的
For more:http://www.ncbi.nlm.nih.gov/RefSeq/key.html#accession