Mechanisms of Alternative Lengthening of Telomeres

Roderick J. O'Sullivan1 and Roger A. Greenberg2 1Department of Pharmacology and Chemical Biology, UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, USA 2Department of Cancer Biology, Penn Center for Genome Integrity, Basser Center for BRCA, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA Correspondence: rjo{at}pitt.edu; rogergr{at}pennmedicine.upenn.edu