Table 2: Biochemical analysis.

Strains Gram Staining 2% NaCl 5% NaCl 7% NaCl 10% NaCl pH-5 pH-6 pH-7 pH-8 pH-9 pH-10 Katalase Voges Nitrate Gelatinase
Z1 - + - - - + + + + + + + + + +
Z2 - + - - - + + + - - - + + - -
Z3 - + - - - - + + + + + + + - -
Z4 - + - - - + + + + + + + + + +

+: Positive, -: Negative.