... MHz, and R2relaxation delays of 10, 20, 30, 50, 70, 90, 110 and 150 mswere used for data collection at 800 MHz. The errors inR1 and R2were determined by generating random distri-butions of ... variability isreflected by extensive DNA contacts between 9 bp of DNA and the b-ribbon arms, and variable contactsbetween additional DNA and the body of the protein[19]. In the case of MC1ÆDNA complexes, ... that thearm of MC1 is essential for DNA binding and bend-ing. The interaction mode of MC1 is probably com-pletely different from those of Sac7d and Cren7, whichbind and bend DNA by placing...