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Half‐saturation constant for carbon fixation (K1/2) at 1°C

Range	~5 µM CO2
Organism	Diatom Fragilariopsis cylindrus
Reference	Kranz SA, Young JN, Hopkinson BM, Goldman JA, Tortell PD, Morel FM. Low temperature reduces the energetic requirement for the CO2 concentrating mechanism in diatoms. New Phytol. 2015 Jan205(1):192-201. doi: 10.1111/nph.12976 p.197 right column 2nd paragraphPubMed ID25308897
Comments	P.197 right column 2nd paragraph: "Additional experiments with F. cylindrus at 1°C, reveal that CO2 is the major carbon source taken up (Fig. 2a) with a half‐saturation constant for carbon fixation (K1/2) c. 5 μM CO2 (Fig. 1b). Measured eCA [extracellular carbonic anhydrase] activities normalized to Chla concentrations were similar to those seen in the field data (Figs 2b, S1)."
Entered by	Uri M
ID	116831