\HeaderA{org.EcK12.egACCNUM}{Map Entrez Gene identifiers to GenBank Accession Numbers}{org.EcK12.egACCNUM}
\aliasA{org.EcK12.egACCNUM2EG}{org.EcK12.egACCNUM}{org.EcK12.egACCNUM2EG}
\keyword{datasets}{org.EcK12.egACCNUM}
\begin{Description}\relax
org.EcK12.egACCNUM is an R object that contains mappings between 
Entrez Gene identifiers and GenBank accession numbers.
\end{Description}
\begin{Details}\relax
This object is a simple mapping of Entrez Gene identifiers
\url{http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=gene} to all possible GenBank 
accession numbers.

Mappings were based on data provided by: Entrez Gene ( ftp://ftp.ncbi.nlm.nih.gov/gene/DATA ) on 2008-Sep2
\end{Details}
\begin{Examples}
\begin{ExampleCode}
    x <- org.EcK12.egACCNUM
    # Get the entrez gene identifiers that are mapped to an ACCNUM
    mapped_genes <- mappedkeys(x)
    # Convert to a list
    xx <- as.list(x[mapped_genes])
    if(length(xx) > 0) {
      # Get the ACCNUM for the first five genes
      xx[1:5]
      # Get the first one
      xx[[1]]
    }
    #For the reverse map ACCNUM2EG:
    # Convert to a list
    xx <- as.list(org.EcK12.egACCNUM2EG)
    if(length(xx) > 0){
       # Gets the entrez gene identifiers for the first five Entrez Gene IDs
       xx[1:5]
       # Get the first one
       xx[[1]]
    }
\end{ExampleCode}
\end{Examples}

