Table 2. Crystallization.

Method	Sitting-drop vapour diffusion
Plate type	96-well plates (VIOLAMO)
Temperature (K)	293
Protein concentration	0.10 mM (PCNA trimer; the protein solution includes 4.0 mM ZRANB3 APIM)
Buffer composition of protein solution	10 mM HEPES–NaOH pH 7.4, 100 mM NaCl
Composition of reservoir solution	0.2 M NaCl, 20% PEG 3350
Volume and ratio of drop	1:1 ratio protein:reservoir (1 µl)
Volume of reservoir (µl)	40