 (Zachar and Bingham, 1982).He also collaborated with Carl Wu and Sarah Elgin (then at Harvard) on fundamental properties of metazoan chromatin structure (Wu, et al., 1979).In collaboration with Margaret Kidwell, then at Brown University, and Gerry Rubin, then at the Carnegie Institution), he carried out the molecular cloning of the P element transposon in Drosophila (Bingham, et al., 1982).