mgug4104aMAP {mgug4104a} | R Documentation |
mgug4104aMAP is an R environment that provides mappings between manufacturer identifiers and cytoband locations.
Each manufacturer identifier is mapped to a vector of cytoband locations. The
vector length may be one or longer, if there are multiple reported
chromosomal locations for a given gene. An NA
is reported for
any manufacturer identifiers that cannot be mapped to a cytoband at this time.
Cytogenetic bands for most higher organisms are labeled p1, p2, p3, q1, q2, q3 (p and q are the p and q arms), etc., counting from the centromere out toward the telomeres. At higher resolutions, sub-bands can be seen within the bands. The sub-bands are also numbered from the centromere out toward the telomere. Thus, a label of 7q31.2 indicates that the band is on chromosome 7, q arm, band 3, sub-band 1, and sub-sub-band 2.
The physical location of each band on a chromosome can be obtained from another environment named "organism"CYTOLOC in a separate data package for human(humanCHRLOC), mouse(mouseCHRLOC), and rat(ratCHRLOC).
Mappings were based on data provided by:
Entrez Gene:ftp://ftp.ncbi.nlm.nih.gov/gene/DATA/. Built: Source data downloaded from Entrez Gene on Mon Sep 25 22:08:18 2006
Package built Mon Sep 25 22:25:30 2006
# Convert the environment to a list xx <- as.list(mgug4104aMAP) # Remove probe identifiers that do not map to any cytoband xx <- xx[!is.na(xx)] if(length(xx) > 0){ # The cytobands for the first two elements of XX xx[1:2] # Get the first one xx[[1]] }