TABLE 1.

Isocitrate lyase activity in M. avium grown on various carbon substrates^a

Carbon source	Mean enzyme sp act (nmol/min/mg of protein) ± SD
Palmitate	1,193.4 ± 0.2
Acetate	439.6 ± 0.2
Glucose	97.6 ± 0.2
Succinate	12.3 ± 0.35
Acetate-glucose	84.7 ± 0.35
Acetate-succinate	17 ± 0.5
Palmitate-glucose	217.5 ± 0.51
Palmitate-succinate	≤5
Middlebrook medium	120.5 ± 0.5

^aCell extracts were made from cultures grown on the indicated carbon source and assayed for enzyme activity. The values represent the mean of at least three independent experiments.