u133x3pGO2ALLPROBES {u133x3p.db} | R Documentation |
u133x3pGO2ALLPROBES is an R object that provides mappings between a given GO identifier and all manufactuerer identifiers annotated at that GO term or one of its children in the GO ontology.
GO consists of three ontologies—molecular function (MF), biological process (BP), and cellular component (CC). All ontologies are structured as directed acyclic graphs (DAGs). Each node in each DAG (tree) is a GO term (id) associated with a named vector of manufacturer identifiers. The name associated with each manufacturer id corresponds to the evidence code for that GO identifier. This object u133x3pGO2ALLPROBES maps between a given GO identifier and all manufactuerer identifiers annotated at that GO term or one of its children in the GO ontology.
The evidence code indicates what kind of evidence supports the association between the GO and Entrez Gene identifiers. Evidence codes currently in use include:
IMP - inferred from mutant phenotype
IGI - inferred from genetic interaction
IPI - inferred from physical interaction
ISS - inferred from sequence similarity
IDA - inferred from direct assay
IEP - inferred from expression pattern
IEA - inferred from electronic annotation
TAS - traceable author statement
NAS - non-traceable author statement
ND - no biological data available
IC - inferred by curator
A GO identifier may be mapped to the same manufacturer identifier more than once but the evidence code can be different. Mappings between Gene Ontology identifiers and Gene Ontology terms and other information are available in a separate data package named GO.
Mappings were based on data provided by:
Gene Ontology ( ftp://ftp.geneontology.org/pub/go/godatabase/archive/latest ) on 200708 and Entrez Gene ( ftp://ftp.ncbi.nlm.nih.gov/gene/DATA ) on 2007-Aug23
ftp://ftp.ncbi.nlm.nih.gov/gene/DATA/
# Convert to a list xx <- as.list(u133x3pGO2ALLPROBES) if(length(xx) > 0){ # Get the probe identifiers for the top 2nd and 3nd GO identifiers goids <- xx[2:3] # Get all the probe identifiers for the first element of goids goids[[1]] # Evidence code for the mappings names(goids[[1]]) }