Minimum D-amino acid concentration required to prevent^* germination by its equivalent L-amino acid.

Tests were conducted in 20 mM Tris buffer, pH 7.4, L-amino acid (1–10 mM), D-amino acid (10–100 mM) + L-lactate (50 mM) and NaHCO3 (50 mM) at 30°C. NT = D-phenylalanine was not inhibitory at 20 mM and could not be tested at a higher concentration due to low solubility. *Defined as a <10% fall in OD600, equating to <1% germination observed microscopically. Minimum D-amino acid concentration required to prevent* germination by its equivalent L-amino acid.