Overfladeantigenerne fremstilles ved hjælp af en metode kaldet rekombinant dna- teknologi: de fremstilles af en gærart, der har fået indsat et gen (dna), som gør den i stand til at producere proteinerne.
The surface antigens are produced by a method known as ‘ recombinant DNA technology’: they are made by a yeast that has received a gene (DNA), which makes it able to produce the proteins.