Crude cell lysates for protein expression analysis were prepared
from C. reinhardtii cells that were grown in 6 well plates, in TAP medium,
at 25 °C, 110 rpm shaking and approximately 50 μE. A volume of
cells equivalent to 0.5 mL of a culture with an optical density of
OD750 = 1, measured on a DU 730 UV/Vis Spectrophotometer
(Beckman Coulter),were harvested fromeach sample and resuspended
in0.1mL10mMTris–HCl (pH 8.0). 0.025mL 5× SDS protein gel loading
buffer (containing β-mercaptoethanol as a reducing agent) were added
to the samples and then boiled at 95 °C for 5min. The crude lysateswere
separated and analysed by SDS-PAGE on a 15% sodium dodecyl sulphate-
polyacrylamide gel and immunoblotted. An HA-antibody
(Sigma-Aldrich) was used to detect the target protein and an AtpB-antibody
(Agrisera, Sweden) as a loading control.