Google-like full text search engine for genes and transcripts stored in NCBI RefSeq. [ homeobox ] [ claudin ] ...... Simple search [ "RNA interference" ] ...... Phrase search by enclosing terms with double quotes [ Argonaute "PAZ domain" ] ...... Return results that contain [ Argonaute ] AND [ "PAZ domain" ] [ NM_001518 ] [ 10579 ] ...... Search for IDs such as RefSeq ID or Gene ID [ symbol:VIM ]