chickenENSEMBL          package:chicken.db          R Documentation

_M_a_p _E_n_s_e_m_b_l _g_e_n_e _a_c_e_s_s_i_o_n _n_u_m_b_e_r_s _w_i_t_h _E_n_t_r_e_z _G_e_n_e _i_d_e_n_t_i_f_i_e_r_s

_D_e_s_c_r_i_p_t_i_o_n:

     chickenENSEMBL is an R object that contains mappings between 
     Entrez Gene identifiers and Ensembl gene accession numbers.

_D_e_t_a_i_l_s:

     This object is a simple mapping of Entrez Gene identifiers <URL:
     http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=gene> to Ensembl
     gene Accession Numbers.

     Mappings were based on data provided by: Entrez Gene (
     ftp://ftp.ncbi.nlm.nih.gov/gene/DATA ) on 2008-Sep2

_E_x_a_m_p_l_e_s:

         x <- chickenENSEMBL
         # Get the entrez gene IDs that are mapped to an Ensembl ID
         mapped_genes <- mappedkeys(x)
         # Convert to a list
         xx <- as.list(x[mapped_genes])
         if(length(xx) > 0) {
           # Get the Ensembl gene IDs for the first five genes
           xx[1:5]
           # Get the first one
           xx[[1]]
         }
         #For the reverse map ENSEMBL2PROBE:
         # Convert to a list
         xx <- as.list(chickenENSEMBL2PROBE)
         if(length(xx) > 0){
            # Gets the entrez gene IDs for the first five Ensembl IDs
            xx[1:5]
            # Get the first one
            xx[[1]]
         }

