Bruce Alberts is noted particularly for his extensive study of the protein complexes which enable chromosome replication when living cells divide. He was the president of the National Academy of Sciences from 1993 to 2005 and is a trustee of the Carnegie Corporation of New York. He is now the editor in chief of Science. Alberts has had a productive research career in the field of DNA replication and cell division. His textbook, The Molecular Biology of the Cell, now in its fifth edition, is the standard cell biology textbook in most universities.