185829-19-0 Betabellin 15D Betabellin 15D (synthetic divalent ion-binding) L-Histidine, L-histidyl-L-seryl-L-leucyl-L-threonyl-L-alanyl-L-lysyl-L-isoleucyl-D-prolyl-D-lysyl-L-leucyl-L-threonyl-L-phenylalanyl-L-seryl-L-isoleucyl-L-alanyl-D-prolyl-D-histidyl-L-threonyl-L-tyrosyl-L-threonyl-L-cysteinyl-L-alanyl-L-valyl-D-prolyl-D-lysyl-L-tyrosyl-L-threonyl-L-alanyl-L-lysyl-L-valyl-L-seryl-, bimol (21-21')-disulfide