Patent ID: 7332332

Claim:
A buffer solution for suspending animal or human cells and/or for dissolving biologically active molecules in order to introduce said biologically active molecules into the cells using electric current, the buffer solution (1) having a buffer capacity of at least 20 mmol×1 −1 pH −1 and an ionic strength of at least 200 mmol×1 −1 at a change in the pH from about pH 7 to about pH 8 and at a temperature of 25° C., and (2) comprising a lower concentration of potassium ions (K + ) between 2 to 6 mmol×1 −1 K + , and a concentration of sodium ions (Na + ) between 100 to 150 mmol×1 −1 Na + , and (3) comprising a concentration of magnesium ions (Mg 2+ ) of at least 10 mmol×1 −1 magnesium ions (Mg 2+ ).