Table 4.

Antimicrobial activity of recombinant peptide K in the presence of different salts, pH, high temperature, and serum.

Salt 1
	NaCl	KCl	NH4Cl	MgCl2
MIC, μg/mL	>400	50	50	200
	CaCl2	ZnCl2	FeCl3
MIC, μg/mL	50	50	50
pH
	2	4	10	12
MIC, μg/mL	50	25	12.5	12.5
Temperature, °C
	100
MIC, μg/mL	12.5
Serum, %
	12.5	25	50
MIC, μg/mL	100	100	100

¹ The concentration of NaCl, KCl, CaCl₂, MgCl₂, FeCl₃, ZnCl₂, and NH₄Cl, were 150 mM, 4.5 mM, 2.5 mM, 1 mM, 4 μM, 8 μM, and 6 μM. MIC: minimum inhibitory concentration.