I want to map my file,which contains refseq id and expression level, to biocyc. when I go to the biocyc web(http://biocyc.org/overviewsWeb/celOv.shtml) and try to upload my data,it says the first column should be gene name or identifiers. But in its sample files(http://pathway.yeastgenome.org/expr-examples/sample.dat) the first column is like "b0003".
what is the id? how to map refseq id to this id?