| Solution Information | help | |
| Enzyme: | Coagulation factor XI | |
| inhibitor: | BDBM32694 | |
| substrate: | n/a | |
| Solution Type: | Aqueous | |
| pH at Preparation: | n/a | |
| Temp. Prep.: | n/a | |
| Comments: | Materials Human plasma factor XIa was purchased from Enzyme Research Laboratories (Cat # HFXIa 1111a). Substrate Boc-Glu-Ala-Arg-AMC was from Bachem (Cat #I-1575.0050). Assay buffer consisted of 50 mM Tris, pH 7.4, 150 mM sodium chloride, 0.02% Tween 20. Low-volume 384-well black plates were from Corning (Item #3676). Assay Factor XIa (0.23 ug/mL) was incubated with Boc-Glu-Ala-Arg-AMC substrate (15 uM) in 10 uL of assay buffer (see above) for 2 hr at room temperature. Hits from mixture HTS were confirmed on single compounds by IC50 determination as described below. IC50 protocol 1.Serial dilute single compounds at 50x concentration in DMSO (16 two-fold dilutions from 2.5 mM to 75 nM) 2.Fill low-volume plate with 4 uL water using Multidrop-micro 3.Add 5 uL assay buffer to columns 1 and 23 using Multidrop-384 4.Add 200 nL of compound (in DMSO from step 1) using Evolution pintool 5.Add 1 uL of Boc-Glu-Ala-Arg-AMC substrate (150 uM in 5x assay buffer) using Multidrop-micro 6.Add 5 u | |
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