The kit is composed of 40 ml of 2 x concentrated Protein Folding Solution, 5 ml of Inclusion Body Solubilizer and 5 ml of Neutralizer. The solution is one of the 96 solutions on the 96-well Protein Folding Plate (PFS096) but supplied as 2x concentrated stock. The catalog number is named after the well position. For example, the catalog number for the solution of well position A4 is PFS-A4. For well position D12, the catalog number is PFS-D12.