hgug4100aMAP          package:hgug4100a.db          R Documentation

_M_a_p _b_e_t_w_e_e_n _M_a_n_u_f_a_c_t_u_r_e_r _I_d_e_n_t_i_f_i_e_r_s _a_n_d _c_y_t_o_g_e_n_e_t_i_c _m_a_p_s/_b_a_n_d_s

_D_e_s_c_r_i_p_t_i_o_n:

     hgug4100aMAP is an R object that provides mappings between
     manufacturer identifiers and cytoband locations.

_D_e_t_a_i_l_s:

     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 object 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 ) on 2008-Apr2

_R_e_f_e_r_e_n_c_e_s:

     <URL: http://www.ncbi.nlm.nih.gov>

_E_x_a_m_p_l_e_s:

             x <- hgug4100aMAP
             # Get the probe identifiers that are mapped to any cytoband
             mapped_probes <- mappedkeys(x)
             # Convert to a list
             xx <- as.list(x[mapped_probes])
             if(length(xx) > 0) {
               # Get the MAP for the first five probes
               xx[1:5]
               # Get the first one
               xx[[1]]
             }

