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

BINDING OF AMINO ACIDS TO THE END GROUP OF A SOLUBLE RIBONUCLEIC ACID.

Proc. Natl. Acad. Sci. U.S.A.. 4 1, 1959;45(4):505-18.
Hecht LI, Stephenson ML, Zamecnik PC.

JOHN COLLINS WARREN LABORATORIES OF THE COLLIS P. HUNTINGTON MEMORIAL HOSPITAL OF HARVARD UNIVERSITY, MASSACHUSETTS GENERAL HOSPITAL, BOSTON.