Ultrastructural, physiological and growth parameters for BMC mutants.

Carboxysome diameters are the mean and standard deviation of a sample size shown in brackets and photosynthetic half-saturation constant K1/2 (Ci) and growth rates are expressed as the mean and standard deviation of at least three replicate cultures. A, Wild-type like carboxysomes (CBX) and carboxysome-like polar bodies (PB). B, wild-type like (WT) or high CO2 requiring (HCR). C, The partially characterised HIND mutant (ccmK2::CmR) [20] and the carboxysomeless ΔccmM mutant [37] are included for reference. D, ΔccmK3-4 has an intermediate physiology which is essentially HCR. n.g., no growth. n.a., ΔccmM has no carboxysome ultrastructure.