Albumins	Bacterial proteins	Blood proteins	Bone morphogenetic proteins	Carrier proteins
Contractile proteins	Dietary proteins	Deoxyribonucleic acid (DNA) binding proteins	Egg proteins	Globulins
Glycoproteins	Hemeproteins	Interferons	Lectins	Lipoproteins
Membrane proteins	Metalloproteins	Nerve tissue proteins	Neculeoproteins	Peptones
Plant proteins	Prions	Cytoplasmic or nuclear receptors	Recombinant proteins	Serpins
Transcription factors	Viral proteins