RT Journal Article SR Electronic T1 Gene Regulation for Higher Cells: A Theory JF Science JO Science FD American Association for the Advancement of Science SP 349 OP 357 DO 10.1126/science.165.3891.349 VO 165 IS 3891 A1 Britten, Roy J. A1 Davidson, Eric H. YR 1969 UL http://science.sciencemag.org/content/165/3891/349.abstract AB