Overexpression Broth OB Description Uniquely formulated Overexpression Broth™ (OB™) that is used in conjunction with our Expansion Broth™ (EB™) for consistent high level recombinant protein expression. Technical Specifications Product Storage Room Temperature Citations Overexpression Broth(OB) Cat # Name Size,Protein M3013-100 Overexpression Broth (OB) 100 ml M3013-500 Overexpression Broth (OB) 500ml Documents SDS (MSDS):