TABLE 3.

Effect of d- or l-tyrosine on the growth of various Synechocystis strains

Cells were grown at 30 °C in modified BG11 medium, under light, in the presence or absence of d- or l-tyrosine. Cells were pre-grown in the growth medium under study. Inoculations were adjusted to an OD₇₅₀ of 0.2. Samples were withdrawn from the culture every day during 7 days, and generation times were deduced from OD₇₅₀ measurements.

	Generation time
	PCC6803	PCC6803ΔDTD3
	h	h
No tyrosine	26 ± 2	27 ± 2
80 μml-Tyr	26 ± 1	25 ± 1
5 μmd-Tyr	29 ± 1	49 ± 3
10 μmd-Tyr	27 ± 3	70 ± 9
15 μmd-Tyr	25 ± 3	104 ± 7
20 μmd-Tyr	25 ± 3	142 ± 9
30 μmd-Tyr	28 ± 3	211 ± 12
80 μmd-Tyr	27 ± 2	No growth