What is the recipe for 1x PBS solution?

The composition of 1x PBS solution is:

• 137 mM NaCl
• 2.7 mM KCl
• 4.3 mM Na₂HPO₄
• 1.47 mM KH₂PO₄

Adjust to a final pH of 7.4.

This solution is not supplied in any QIAGEN Kit, but is used in protocols for various QIAGEN transfection kits.