. 2003 Jul 18;100(16):9214–9219. doi: 10.1073/pnas.1533326100

Table 4. Single crystal structures for RNA·DNA hybrid duplexes.

Sequence	Structure	Space group	Crystal packing	Ref.
r(CAAAGAAAAG)·d(CTTTTCTTTG)	Intercalation	1222	Abutting and head-to-head	This work
	RNA-C2′ endo for 2A, C3′ endo for others		(1 and 1* and 20 and 20*)
	DNA-C3′ endo
r(CAAAGAAAAG)·d(CTTTTCTTTG)	A-like	P2₁2₁2₁	Abutting	25 and M.L.K., L. Lavelle, G.W.H., H.-L. Ng, and R.E.D., unpublished data
r(GAAGAAGAG)·d(CTCTTCTTC)	A-like	P6₁	Abutting	49
r(GAAGAGAGAG)·d(CTCCTCTTC)	A-like flipped-out base	1222	Abutting and head-to-head, looped-out, bulge interaction	31
r(GAAGAGAAGC)·d(GCTTCTCTTC)	A-like	P2₁2₁2₁	Abutting	50
r(GAAGAAGAA)·d(TTCTTBr⁵CTTC)	A-like	P6₁	Abutting	51
r(UUCGGGCGCC)·d(GGCGCCCGAA)	RNA-C3′ endo	P4₃22	Abutting and head-to-tail	52
	DNA-C2′ endo for AA, C3′ endo for others		(1 and 20, and 20 and 1)