Basic Search

• Just enter search terms without specifying search fields, other limits, or Boolean operators
• Use the Details button to see exactly how Entrez parsed and handled your query

I'd like to retrieve human nucleotide sequences associated with colon cancer.

Demo: search Entrez CoreNucleotide for human colon cancer View document summary page (title list summarizing search results) How many hits? Any to non-human records? Where does word "human" appear in them? View search Details to see how the system parsed and processed your query