Paper Chase is a research database designed to offer abstracts of research articles published in journals that have a highly rated impact factor as determined by ISI Impact Factor and PageRank. Abstracts are organized by date, with the most recently published papers listed first. 

Paper Chase

THE ENZYMATIC ACTIVATION OF SULFATE.

Proc. Natl. Acad. Sci. U.S.A.. Nov 15, 1955;41(11):880-90.
Hilz H, Lipmann F.

BIOCHEMICAL RESEARCH LABORATORY, MASSACHUSETTS GENERAL HOSPITAL, AND DEPARTMENT OF BIOLOGICAL CHEMISTRY, HARVARD MEDICAL SCHOOL, BOSTON, MASSACHUSETTS.