Table 1.

Summary of all CAP-DNA crystal structures

Crystal Form	Space group	Average Unit Cell (Å)	Base-pairs	Protein	DNAa	Reference
A	C2221		30	CAP	GC31	[13]
		a=137		CAP	GCE31	[14]
		b=153		CAP	ICAP30	[15]
		c=76		[E181F]CAP	ICAP30	[15]
				CAP	[6C;17G]ICAP30	[28]
B	P3121	a=78	38-46 (26 modeled)	CAP	DNA46	[30]
				CAP	ICAP38	[28]
		b=78		CAP	[6C;17G]ICAP38	[28]
		c=142		[E181D]CAP	[6C;17G]ICAP38	[36]
C	P212121	a=61	38	CAP	ICAP38	this work
		b=76		CAP	[6A;17T]ICAP38	this work
		c=180		CAP	[6G;17C]ICAP38	this work
C′	P212121	a=61	38 (35 modeled)
		b=78		CAP	[6C;17G]ICAP38	this work
		c=155

^aDNA sequences are defined in Figure 1