Figure 5From: Comparison of binder compositions in Pompeian wall painting styles from Insula OccidentalisPCA score plot obtained based on the amino acid contents for the four Pompeian samples and 15 reference proteins. The relative percentages of amino acids in the Pompeii samples and of protein from wheat flour, egg, animal glue and milk are reported in Additional file 1: Tables S4 and S5.Back to article page