24 hours after transfection, the medium from the Phoenix cell dishes was removed, supplemented with 8 μg/ml polybrene (cationic polymer used to increase the retroviral infection efficiency in cell culture) and filtered to remove cell debris.
The resulting supernatant was removed, supplemented with 200 μl of TE and 8 μl of 1 mg/ml RNAse A (Ambion Cat #2271) and incubated at 37°C for 30 min. Then, 4 μl of 10 mg/ml proteinase K was added and samples were incubated at 55°C for another 2 hr.
The government's real agenda is to remove supplements for antisocial hours so that doctors can be asked to do routine work at weekends or long into the evenings without their employers incurring financial penalty.
Then, incubation fluid of all samples was removed and supplemented with 1 ml of the neutralizing solution to prevent reminiscent toxicity.
This list of recommended candidates (n = 96, duplicates removed) was supplemented with contact details of key authors on cash programming (for health) available from the published literature (n = 19).
After 24 h, to allow attachment the medium was removed and supplemented with culture medium containing increasing concentrations of VK1 (10 μM, 50 μM, 100 μM, and 200 μM) for 24 h, 48 h, and 72 h.
When required, excess of dithionite was removed by supplementing the mixture with a molar excess of 20 mM potassium ferricyanide (III), (Sigma-Aldrich, Germany), added from a 1 M stock solution in water.
The ECs were subcultured monthly on MSB medium, with KNO3 doubled but NH4NO3 removed, and supplemented with 3% (w/v) glucose, 0.25% (w/v) Phytagel, 0.5 mg/L IBA, 0.15 mg/L kinetin, 1.0 g/L glutamine and 0.5 g/L asparagines, for embryo maturation.
When watermelon juice with the amino acids removed was supplemented with yeast extract (295 mg N/L added before yeast addition; 295 mg N/L added at 6 h) and diammonium phosphate (106 mg N/L added before yeast addition; 233 mg N/L added at 6 h) for a total of 975 mg N/L, the fermentation rate returned to that of complete watermelon juice.
