Mr=1951.23, trigonal system, space group R3, hexagonal cell dinensions: a=b=23.8358, c=11.6716 A,V=5742.8A3, Z=3, Dc=1.693g/cm3, final R=0.044 for 3648 indepen
Biological nitrogen-fixation catalyzed by redox enzymes is a subject that biochemists and chemists are interested in. Because of the difficulties in determinin
2,2,6,6-Tetramethyl-4-(bis-ethyteneimino) triazinamino-piperidine-1-oxyl was used as the spin label. In ESR spectra of the product obtained (SL-DNA), the stron
INTRODUCTION. Considering the interesting bonding nature and the importance in some biochemical processes chemists and biochemists recently have made quite ext