Figure 2.

Diagrammatic representation of various Fab molecules along with their molecular weight in kDa. S, serine; C, cysteine; L, spacer with sequence SGGGSGGGASG; yield corresponds to calculated amount of Fab (in mg) obtained from four litre of renatured material (containing 400 mg of total protein). Reactivity of proteins to HIV-1 and HIV-2 serum samples based on Table 2.