TABLE 1.

Toxicity of processed haloarchaeal culture supernatants toward S. solfataricus

Haloarchaeon	Zone of inhibitiona (diam [mm])	Plating efficiencyb	Effect
TuA4	12	1	Cytocidal
GN101	7	45	Cytostatic
S8a	4	100	Cytostatic

^aMeasured after direct application of 10 μl to the surface of the overlay. 

^bPercentage of colonies resulting from treatment with equal volumes of processed culture supernatants relative to an untreated control. The experiments were repeated four times, and results varied by less than 10%. Values shown are averages for replicate samples which varied by less than 5%.