Table 3. Variation in the inter-domain orientation of structurally characterized M20D proteases.

Protein	Calculated angle (°)
SACOL0085, chain A	139.8
SACOL0085, chain B	141.3
SACOL0085, chain C	145.0
SACOL0085, chain D	146.0
YXEP (PDB entry 1ysj)	141.5
ILL2 (PDB entry 1xmb)	147.3