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U0251 SIGMA Urease from Canavalia ensiformis (Jack bean) Type C-3, powder, ≥600,000 units/g solid CAS Number 9002-13-5 type Type C-3 form powder purified by crystallization storage temp. −20°C Description Unit Definition One micromolar unit will liberate 1.0 μmole of NH3 from urea per min at pH 7.0 at 25 °C. It is equivalent to 1.0 I.U. or 0.054 Sumner unit (1.0 mg ammonia nitrogen in 5 minutes at pH 7.0 at 20 °C) Biochem/physiol Actions Urease was shown to induce vacuolation in Hela cells, an effect dependent on the ability of urease to convert urea to ammonia. 1 General description Subunit molecular weight: ~90,770 Composed of six subunits with total molecular weight: ~544,620
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