115	BIOCHEMICALS, RESEARCH
11505  *	Biochemical Reagents and Tests: Antibiotic Assays, Differentiation Discs, etc.
11510  *	Biochemicals: Amino Acids, Enzymes, Nucleotides, Peptides, etc.
11512  *	Blood Fractions (Not for Human Use): Antigens, Antiserums, Controls, Serums, etc.
11515  *	Chemicals, Isotopically Labeled (With Deuterium, Radionuclides, etc.)
11518  *	Culture Media, Dehydrated
11519  *	Culture Media, Prepared (For Microbial Cultures, see 495-38)
11550  *	Nutritional Chemicals (Not For Human Use): Carbohydrates, Proteins, Vitamins, etc.
11570  *	Research Diets, Special Purpose (For Experimental Animals)
11590  *	Stains, Prepared