| Extract Buffer (XB) salts (20×)
|
50 mL |
| Sucrose (2 m; filter-sterilized and stored in aliquots at −20°C)
|
25 mL |
| K-HEPES (1 m; K salt; pH 7.7; filter-sterilized and stored in aliquots at −20°C)
|
10 mL |
| MgCl2 (2 m; e.g., Sigma-Aldrich 68475)
|
1 mL |
| EGTA (0.5 m; K salt; pH 7.7; filter-sterilized and stored in aliquots at –20°C)
|
20 mL |
| Make fresh on the day of extract preparation. Combine and bring to 1 L with MilliQ H2O. Adjust pH to 7.7 with KOH.
|