Table 3. Extending the partial match.

	a	b	c	d
1B0F Motif	SER195	HIS57	SER214	GLY193
1CFE motif	SER49	HIS48	TYR36	ALA51
	ab	ac	ad	bc	bd	cd
PDB	Pairwise Distances
1B0F	5	6.8	4.6	4.7	9.4	11
1CFE	4.9	6.8	4.5	5	9.1	10
	Pairwise Potential difference
1B0F	53.7	105.7	−111.1	51.9	−164.9	−216.8
1CFE	15.3	88.6	−58.1	73.3	−73.4	−146.8

Spatial and electrostatic potential difference (PD) congruence in cognate pairs in the human neutrophil elastase (PDBid:1B0F) and the pathogenesis related P14A protein (PDBid:1CFE) for an extended set of four residues in the active site.