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All cancers are caused by somatic mutations; however, understanding of the biological processes generating these mutations is… Expand Here we report, for the first time, on the global distribution of perfluorooctanesulfonate (PFOS), a fluorinated organic… Expand The work of one of us (W. B.) was supported by a grant of the Human Frontiers Science Program. We wish to thank Drs. C. P. Hill… Expand Attempts to study the genetic population structure of large mammals are often hampered by the low levels of genetic variation… Expand Conservation biology has two threads: the small-population paradigm which deals with the erect of smallness on the persistence of… Expand Joseph T. Jerrett and Peter T. Lansbury, Jr. Department of Chemistry Massachusetts Institute of Technology Cambridge… Expand The three-dimensional structure of acetylcholinesterase from Torpedo californica electric organ has been determined by x-ray… Expand This chapter reviews basic issues of theory and method in approaches to research on teaching that are alternatively called… Expand With a stepwise degradation and terminal labeling procedure the 3'-terminal sequence of E. coli 16S ribosomal RNA is shown to be… Expand Introduction The various colors of iodine in different solvents have attracted the attention of investigators for over half a… Expand