Table 2.

Comparison of our maximum isoprene production per day with data, which were reported in previous studies using cyanobacteria

Maximum isoprene production per day	Expression cassette localized on …	Reference
50 µg/g DCW	Chromosome	[4]
67 µg/g DCW	Chromosome	[5]
250 µg/g DCW	Chromosome	[6]
63 µg/g DCW (pH 10)	Chromosome	[7]
25 µg/g DCW (pH 10 + 600 mM NaCl)	Chromosome	[7]
93 µg/g DCW (0 % NaCl)	Plasmid	This study (# 642 in the closed system)
71 µg/g DCW (4 % NaCl)	Plasmid
336 µg/g DCW (0 % NaCl)	Plasmid	This study (# 642 in the open system)

The isoprene values of Chaves et al. [7] and of Bentley and Melis [5] were recalculated to the dry weight basis using the reported relation of OD₇₅₀ to dry cell weight (DCW). The calculation of the dry cell weight in our study based on the determined relation OD₇₅₀ to dry cell weight (DCW) shown in the Additional file 10