Table 1.

Unit cells and space groups for four different structures of double-D

Structure	PDB index	Space group	Unit cell				Resolution, Å
			a, Å	b, Å	c, Å	β, deg
DD-NL	1FZE	P21	108.0	48.6	166.4	104.6	3.0
DD-GP	1FZB	P21	93.8	96.5	113.8	96.1	2.9
DD-BOTH	1FZC	P21	83.4	95.6	113.6	90.2	2.3
DD-GH	1FZF	P212121	54.8	149.4	234.7	—	2.7

Adapted from Everse et al. (5).