Table 2. Crystallization of GPx4.

Method	Spontaneous crystallization
Plate type	1.5 ml reaction tube
Temperature (K)	293
Protein concentration (mg ml−1)	2
Buffer composition of protein solution	100 mM MES, 5 mM TCEP pH 6.5
Composition of reservoir solution	None
Volume and ratio of drop	N/A
Volume of reservoir	N/A