ELISA of matched plasma and RBC lysates from thirteen NHPs (CTL group, n = 7; HF group, n = 6; whose heart sections were used for histopathological evaluation in Fig. 1 and amylin assessment in Fig. 2) indicated that the amylin level was substantially higher in these two blood components (Fig. 3f, g) than the average level of amylin in CTL NHPs. The gene discussed is IAPP; the disease is hydrops fetalis.