Modifiers matching catalyst:

• biological,
• homogeneous,
• useful,
• metal,
• precious,
• heterogeneous,
• liquid,
• usual,
• acidic,
• acid,
• enzymatic,
• necessary,
• environmental,
• solid,
• heavy,
• active,
• volatile,
• possible,
• suitable,
• common,
• granular,
• major,
• macromolecular,
• proteinaceous,
• cheap,
• conventional,
• soluble,
• natural,
• metallic,
• ferromagnetic,
• expensive,
• related,
• external,
• traditional,
• appropriate,
• cultural,
• chemical,
• optical,
• benign,
• cationic,
• complex,
• basic,
• auxiliary,
• diverse,
• base,
• extraneous,
• strong,
• single,
• alternative,

Simple categories matching proteinaceous:

• compound,
• part,
• medium,
• substance,
• material,
• fibre,
• feed,
• substrate,
• polymer,
• molecule,
• food,
• fluid,
• surface,
• macromolecule,
• agent,
• matrix,
• stain,
• drug,
• meat,
• catalyst,
• content,
• carrier,
• adhesive,
• structure,
• membrane,
• component,
• fiber,
• binder,
• antigen,