Epitopic hexapeptide sequences from Baltic cod parvalbumin beta (allergen Gad c 1) are common in the universal proteome

► Gad c 1 hexapeptides were used as query sequences for UniProt database screening. ► Hexapeptides occur in proteins which are not homologs of parvalbumin. ► Hexapeptides occur in proteins from organisms involved in food technology ► Hexapeptides occur in proteins from human symbionts, commensals and pathogens. ► Coverage between epitopes from allergens and pathogens should be avoided in vaccines.