Rise G○C T 3.4A A T<A Minor 1 nm Groove 3.4 nm A>T Major Pitch Groove 34A 10.4 bp/turn A.>T G)C 0.34nm >T (a) 199g Addiaon Wesley Longman,Inc. Width 20 A Pitch 34 Å Rise 3.4 Å Width 20 Å Major Groove Minor Groove 10.4 bp/turn