Table 2.

Structural changes in the DNA double-stranded stem between 3 and 200 MPa (30 and 2000 bar)

	Low P	High P	% change
Vol, 0 Å probe (Å3 × 103)	3.330	3.328	−0.06
Vol, 1.4 Å probe (Å3 × 103)	7.174	7.171	−0.042
Izza	5630	5724	+1.7
Ixxa	947	918	−3.1
Iyya	704	676	−4.0
Stem length (Å)b	18.84	19.06	+1.2
Mean rise (Å)	2.85	2.87	+0.55

^aMoments of inertia. The z axis runs along the DNA helical axis.

^bCalculated as the distance between the two terminal base pairs (calculating mean coordinates for the two pairs).