Contents

17 June 2005
Vol 308, Issue 5729

About The Cover

Cover image expansion

COVER Human embryonic stem cells derived by nuclear transfer (green moon) match the donor cells genetically and immunologically (human leukocyte antigen data sets represent bamboo), regardless of the age, sex, or disease status of the donor of the nucleus. The patient-specific cell lines described on page 1777 may aid in the discovery of complex disease mechanisms and human developmental processes. [Image: H. Qidwai]