35 Packaging articles to the order and specification of others; retail store services featuring laboratory reagents and research related chemicals in known molecular quantities such as guanidine hydrochloride, guanidine thiocyanate, tris, tris hydrochloride, urea, ammonium acetate, ammonium sulfate, sodium acetate, boric acid, ethylene diaminetetraacetic acid, also known as EDTA, hepes buffer, mops, lithium chloride