Cell Full-text available for 1974-present (one year embargo for open access).
Molecular Biology of the Cell (MBoC) Full-text available 1997-2011. Articles must be a least a year old for full-text access.
Nature Full-text available 1990-present (one year embargo) in ProQuest Science Journals
Science Full-text available in JSTOR 1880-2009
Proceedings of the National Academy of Sciences (PNAS) Full-text available in JSTOR 1915-2009
See also the Public Library Of Science: Biology for other full-text articles from open-access biology journals.