Decrease of population fitness upon inbreeding.

The recovery is thought to be due to the presence of additional ATP brought about by the inhibition of protein synthesis and through the addition of amino acids in the pool. The amino acids could provide additional ATP through inhibitory feedback mechanisms and the catabolism of amino acids. The exogenous use of citrulline, histidine, proline, glycine, phenylalanine, cysteine, isoleucine, alanine, threonine, and serine reduced the aberration yield to a value approximating that obtained with the antibiotics.