PALO ALTO, Calif.--Maker of genomics database products, Incyte Pharmaceuticals extended for three more years its collaboration with Pfizer and expanded the scope of its original 1994 agreement to allow Pfizer access to a proprietary Incyte database of full-length genes and a DNA clone set. Pfizer will have continued access to the gene sequence and expression database it has contracted since 1994. Financial terms of the agreement were not disclosed.