TABLE 3.

Representative amount of alkali required to alter a yeast suspension at an optical density at 600 nm of 0.4 from pH 6.5 to 10^a

Designationb	Pertinent genotype	μmol of NaOH
a	BTN1+ HSP30+ BTN2+	1.7
b	btn1-Δ HSP30+ BTN2+	1.5
c	BTN1+ hsp30-Δ BTN2+	1.3
d	btn1-Δ hsp30-Δ BTN2+	1.2
e	BTN1+ HSP30+ btn2-Δ	1.3
f	btn1-Δ HSP30+ btn2-Δ	1.2
g	BTN1+ hsp30-Δ btn2-Δ	1.3
h	btn1-Δ hsp30-Δ btn2-Δ	1.1

^aResults reflect one of a series of five similar experiments, each of which resulted in a decreased buffering capacity for mutant strains compared to normal strains. The amount of HCl required to alter the pH of the same yeast strain suspension to from pH 6.5 to pH 3.0 was not significantly different. 

^bSee Table 1 for strain numbers.