5x LDS reagent product blog Tags: Reagent; 5x LDS; 5x LDS reagent; Posted by mybiosource_staff on . The 5x LDS n/a (Catalog #MBS433673) is a Reagent and is intended for research purposes only. The product is available for immediate purchase.To buy or view more detailed product information and pricing, please click on the technical datasheet page below:5x LDS Protein Sample Loading Buffer