chrominfo.Mb:
Basic Chromosomal Information for UCSC Human Genome Assembly July 2003
freeze
Description
This dataset contains basic chromosomal information for UCSC Human
Genome Assembly July 2003 freeze.
Format
A data frame with 24 observations on the following 3 variables.
- chrom
- Chromosomal index, X is coded as 23 and Y as 24.
- length
- Length of each chromosome in megabases.
- centromere
-
Location of the centromere on the chromosome (Mb).
Source
http://genome.ucsc.edu/cgi-bin/hgTextDetails
This file is used for many plotting functions. The centromeric location is
approximately estimated by taking mid-point between the last
fish-mapped clone on the p-arm and the first fish-mapped clone on the
q-arm using relevant UCSC freeze.
For an alternative freeze, one needs to manually create a 3-column
file of the format described above.