Segetalin A is the most common peptide in carnation seed. The characteristic feature of cyclic peptides is their ring structure which makes them very stable against heat and low pH. Segetalin A is even stable against 20 minutes of autoclaving.
In the same group of extracted products, there is also a small amount of very potent protein inhibitors, ribosome inactivating proteins (RIBs). In collaboration with Charité Hospital in Berlin, Germany, and Freie Universität Berlin, RIBs have been found to be increased by hundred thousandfold in combination with Carnation saponins.