“…The ratio between C17:0 and C21:0 has been suggested to distinguish between different cereals because the ratio is close to 1.0 for rye, 0.1 for common wheat and 0.001 for durum wheat (Chen et al, 2004;Landberg et al, 2006a). Owing to the amphiphilic nature of AR molecules, they are incorporated in biological membranes Parikka et al, 2006), in which they may affect membrane permeability, and enhance the bi-layer rigidity and stability (Kozubek and Demel, 1980;Kozubek, 1987;Gubernator et al, 1999). The bioavailability of AR homologues increases with homologue length (Landberg et al, 2006b) and AR homologues with higher relative bioavailability (C23:0 and C25:0) have been shown to be closer correlated with intake (Landberg et al, 2008a).…”