GOCCOFFSPRING             package:GO.db             R Documentation

_A_n_n_o_t_a_t_i_o_n _o_f _G_O _I_d_e_n_t_i_f_i_e_r_s _t_o _t_h_e_i_r _C_e_l_l_u_l_a_r _C_o_m_p_o_n_e_n_t _O_f_f_s_p_r_i_n_g

_D_e_s_c_r_i_p_t_i_o_n:

     This is an R object mapping GO identifiers to all the GO
     identifiers of their offspring based on the  cellular component
     (CC) GO terms. Offspring are defined as the direct or indirect
     children/grand children nodes of a given node for a GO identifier
     based on the directed acyclic graph defined by Gene Ontology
     Consortium. GO terms for offspring nodes are more specific than
     that of the parent.

_D_e_t_a_i_l_s:

     GO identifiers are keys and the corresponding offspring GO
     identifiers are values. Values are vectors of GO identifiers for
     all the offspring of the key GO identifier. GO identifiers that do
     not have any offspring node are assigned NA as the value. 

     Cellular component is defined as the subcellular structures,
     locations, and macromolecular complexes; examples include nucleus,
     telomere, and origin recognition complex as defined b y Gene
     Ontology Consortium. 

     Mappings were based on data provided: Gene Ontology (
     ftp://ftp.geneontology.org/pub/go/godatabase/archive/latest ) on
     200803

_R_e_f_e_r_e_n_c_e_s:

     <URL: http://www.geneontology.org/> and <URL:
     http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=gene>

_E_x_a_m_p_l_e_s:

       # Convert the object to a list
       xx <- as.list(GOCCOFFSPRING)
       # Remove GO identifiers that do not have any offspring
       xx <- xx[!is.na(xx)]
       if(length(xx) > 0){
         # Get the offspring GO identifiers for the first two elents of xx
         goidentifiers <- xx[1:2]
       }

