Table 2.

Examples of commensal, pathogenic, and environmental viruses that display identical (at least five amino acids) proteins sequences with appetite-regulating peptides

Viruses	Peptides
	Leptin	Insulin	PYY	Ghrelin	NPY	AgRP	Galanin	Orexin	MCH	α-MSH	ACTH	CRH	OT	VP
Commensal
Lactobacilli bacteriophage	+	+		+									+
Enterobacteria phage		+								+
Salmonella bacteriophage			+
Mycobacteriophage				+					+
Pathogenic
Hepatitis C virus		+							+
Hepatitis B virus											+
Influenza A virus											+
Gastroenteritis virus		+
HIV-1	+						+			+				+
HIV-2														+
Orf virus								+	+		+
Human foamy virus	+
Human coronavirus						+
Human herpesvirus 4								+
Mayaro virus								+
Rabies virus									+
Environmental
Cowpox virus	+
Porcine respiratory syndrome v.		+			+
Duck adenovirus				+
Suid herpes virus						+
Gallid herpesvirus							+
Lymphocystic disease v. (fish)								+
Equine arteritis virus											+

α-MSH, α-melanocyte–stimulating hormone; ACTH, adrenocorticotropic hormone; AgRP, agouti-related protein; CRH, corticotropin-releasing hormone; HIV, human immunodeficiency virus; MCH, melanin-concentrating hormone; NPY, neuropeptide Y; OT, oxytocin; PYY, peptide tyrosine-tyrosine; VP, vasopressin; v., virus