Hy-Express™ System IV

Hy-Express™ System IV is a total nitrogen source designed to give optimal product expression in E.coli. expression systems. It replaces both the yeast extract & peptone typically used in fermentations. A technical, partly soluble, grade of this product is available also under the name Hy-Express™ System V.

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  1. Hy-Express IV
  2. Hy-Yest 412
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