Table 1.

Summary of RTA-VHH structures

	RTA-VHHa
	E5	D10	G12	G11	A7
dmin (Å)	2.4	1.8	2.7	1.8	2.3
Space group	P212121	P212121	C2	P21212	P41
Rc/Rfreed (%)	22.5/28.0	18.0/20.4	20.0/24.8	19.8/24.9	19.3/24.8
PDB code	4LGP	4LGR	4LGS	4LHJ	4LHQ

^a, all complexes formed by co-crystallization.

^bR = ∑||F_o| − |F_c||/∑||F_o||, where F_o and F_c denote observe and calculated structure factors, respectively.

^cR_free was calculated using 5% of data excluded from refinement.