Leukocyte Esterase, Unsonicated

Product Name	Whole Leukocyte Esterase
Source	Human Leukocytes
Catalogue Number	341-10
Purity	Blood Fraction
Form	Liquid
Activity	Esterase: 5.0 - 6.0 U/mL
Unit Definition	One unit will catalyze the hydrolysis of one micromole of methoxy succinyl-alanine-proline-valine-p-nitroanilide per minute at 37°C and pH 7.5 (In the presence of 100 mM Tris-HCl 500 mM sodium chloride and 0.2% Triton X-100)
Dipstick Assay	On lysing the leukocytes, 0.45 mL per liter of saline will give a positive reaction for leukocytes with Roche Chemstrip^® 10 SG or Siemens Multistix^® 10 SG test strips.
Formulation	Suspension in 154 mM sodium chloride.
Appearance	Milky, white to off-white suspension
Related Products	910-12 - Bilirubin Conjugate, Ditaurate, Sodium Salt 651-10 - Urobilinogen 343-10 - Esterase from porcine liver
Storage	-20°C
Recertification	2 years
Infectious Disease Testing	Negative or non-reactive at the donor level for anti-HIV 1 and 2, anti-HCV, HBsAg, HIV-1 (NAT), HBV (NAT), HCV (NAT), and syphilis by FDA approved methods.
Synonyms	Unsonicated White Blood Cell Elastase, WBC Elastase