Table II.

Statistics for MnSOD in T. pseudonana CCMP1335

These data show the cell-specific MnSOD budget based on quantitative immunoanalyses (see “Materials and Methods”). Although MnSOD accounts for a small percentage of the total protein, it is an important pool of Mn in the cell. Cells were grown under continuous light, 120 μmol m⁻² s⁻¹ at 20°C.

Unit of Measure	Valuation
Protein mass per cell	19.8 ± 3 fg MnSOD cell−1
Molecules per cell	5.5 ± 0.9 × 105 MnSOD cell−1a
Molecules per cell	2.7 ± 0.5 × 105 HOLO-MnSOD cell−1b
Moles per cell	0.9 ± 0.2 amol cell−1
Cell volume	19.6 ± 0.8 fLc
Percent of total protein	1.4% ± 0.2%

^aBased on molecular mass of 21.798 kD.

^bBased on hypothetical homodimer with a molecular mass of 43.696 kD.

^cBased on scanning electron micrography.