<p>This entry represents a structural domain consisting of 4-helices with a folded leaf topology, and forming a right-handed superhelix. This domain occurs in several proteins, including:</p><p> <ul><li>Plant lipid-transfer proteins, such as the non-specific lipid-transfer proteins ns-LTP1 and ns-LTP2 [<cite idref="PUB00023773"/>, <cite idref="PUB00026937"/>].</li><li>Proteinase/alpha-amylase inhibitors, such as trypsin/alpha-amylase inhibitor RBI from <taxon tax_id="4511">Eleusine coracana</taxon> (Indian finger millet) [<cite idref="PUB00031509"/>] and Hageman factor/amylase inhibitor from <taxon tax_id="4577">Zea mays</taxon> (Maize) [<cite idref="PUB00023587"/>].</li><li>Seed storage proteins, such as Napin from <taxon tax_id="3708">Brassica napus</taxon> (Rape) [<cite idref="PUB00000432"/>] and 2S albumin from <taxon tax_id="3988">Ricinus communis</taxon> (Castor bean) [<cite idref="PUB00022470"/>].</li></ul> </p> Bifunctional inhibitor/plant lipid transfer protein/seed storage