Screen name: Low Ionic Strength Screen owner: Hampton Research A1 0.050 M Potassium chloride, pH=2.0; 4.000 w/v Polyethylene glycol 3,350; ph=2.0 A2 0.050 M tri-Sodium citrate, pH=3.0; 8.000 w/v Polyethylene glycol 3,350; ph=3.0 A3 0.050 M tri-Sodium citrate, pH=3.5; 12.000 w/v Polyethylene glycol 3,350; ph=3.5 A4 0.050 M tri-Sodium citrate, pH=4.0; 16.000 w/v Polyethylene glycol 3,350; ph=4.0 A5 0.050 M tri-Sodium citrate, pH=4.5; 20.000 w/v Polyethylene glycol 3,350; ph=4.5 A6 0.050 M tri-Sodium citrate, pH=5.0; 24.000 w/v Polyethylene glycol 3,350; ph=5.0 B1 0.050 M tri-Sodium citrate, pH=5.5; ph=5.5 B2 0.050 M MES, pH=6.0; ph=6.0 B3 0.050 M BIS-TRIS, pH=6.5; ph=6.5 B4 0.050 M Imidazole, pH=7.0; ph=7.0 B5 0.050 M HEPES, pH=7.5; ph=7.5 B6 0.050 M tris chloride BCC, pH=8.0; ph=8.0 C1 0.050 M tris chloride BCC, pH=8.5; ph=8.5 C2 0.050 M Glycine, pH=9.0; ph=9.0 C3 0.050 M Glycine, pH=9.5; ph=9.5 C4 0.050 M Glycine, pH=10.0; ph=10.0 C5 0.050 M di-Sodium hydrogen phosphate, pH=11.0; ph=11.0 C6 0.050 M di-Sodium hydrogen phosphate, pH=12.0; ph=12.0 D1 D2 D3 D4 D5 D6