+, all tested strains showed measurable enzyme activity;–, no tested strain showed measurable enzyme activity; +/–, 50% or more tested strains showed measurable enzyme activity;–/+, 50% or less showed
aCovalent FAD is expressed in pmol covalend FAD mg of protein−1 and is an estimation of the total amount of succinate dehydrogenase enzyme present in the mitochondrial preparation, presented values ar
