| Reagent | Final Concentration | Volume | Mass |
| dH2O | 400 ml | ||
| ficoll (type 400, Pharmacia) | 1 % | 5 g | |
| polyvinylpyrrolidone | 1 % | 5 g | |
| bovine serum albumin (BSA, Fraction V, Sigma) | 1 % | 5 g |
QS with dH2O to 500 ml. Mix overnight. Then filter through a disposable filter unit and freeze in 10 ml aliquots.