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

Biochemistry. Nudging through a nucleosome.

Science. Jul 31, 2009;325(5940):547-8.
Otterstrom JJ, van Oijen AM.

Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA.