[Bioc-sig-seq] Querying Pubmed using search terms?

[Purnachander]

Hello,

I'm using "annotate" package to access articles from PUBMED. I found 
that I can access articles only If I know PMID's.

For E.g:
 > id<-c("1939271" "2449431" "7729427" "7835343" "7836461" "7933101")
 > x<-pubmed(id)

Is it possible to search Pubmed with query terms like "RNA-seq", 
"Metagenomics", etc.

Regards,
Purnachander