ProCHO™ Protein-free CHO Media were developed specifically to facilitate the production and downstream processing of recombinant proteins expressed in CHO cells. These proteinfree formulations support high-density cultures without the need for animal derived components. Very low levels of recombinant insulin facilitate both downstream purification and regulatory compliance. ProCHO™-5 - For CHO cells already growing in suspension. Supports increased protein production. Contains 0.1% Pluronic® F-68. Does not contain L-glutamine, phenol red, hypoxanthine, or thymidine.