Authors: V Derbyshire; P S Freemont; M R Sanderson; L Beese; J M Friedman; C M Joyce; T A Steitz Journal: Science Date: 1988-04-08 Impact factor: 47.728
Authors: A Morrison; R B Christensen; J Alley; A K Beck; E G Bernstine; J F Lemontt; C W Lawrence Journal: J Bacteriol Date: 1989-10 Impact factor: 3.490