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50 mM Na acetate, pH 6.0 with 100 mM NaCl

>=95% by SDS-PAGE

MW 130,000-150,000

Shown to be non reactive for HBsAg, anti-HCV, anti-HBc, and negative for anti-HIV 1 & 2 by FDA approved tests

> 1 year 

<= -20° C

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