EBI注释文件

'dna'：

unmasked genomic DNA sequences。
未掩蔽的基因组DNA序列。

'dna_rm'：

masked genomic DNA. Interspersed repeats and low complexity regions are detected with the RepeatMasker tool and masked by replacing repeats with 'N's.
掩蔽了的基因组DNA。卫星重复序列和低复杂区域使用RealMasker工具检测，并使用'N'替换重复序列。

'dna_sm'：

soft-masked genomic DNA. All repeats and low complexity regions have been replaced with lowercased versions of their nucleic base
软掩蔽基因组DNA。所有重复序列和低复杂度区域使用它们的碱基的小写字母所取代

'chromosome'

The top-level coordinate system in most species in Ensembl
Ensembl中大多数物种的顶级坐标系统

'nonchromosomal'

-Contains DNA that has not been assigned a chromosome
含有未被定位到染色体的DNA

'seqlevel'

This is usually sequence scaffolds, chunks or clones.
这通常是序列支架、块或克隆。
-- 'scaffold'
Larger sequence contigs from the assembly of shorter sequencing reads (often from whole genome shotgun, WGS) which could not yet be assembled into chromosomes. Often more genome sequencing is needed to narrow gaps and establish a tiling path.