137181-56-7 L-Alanyl-L-valyl-L-glutaminyl-L-seryl-L-lysyl-L-prolyl-L-prolyl-L-seryl-L-lysyl-L-arginyl-L-alpha-aspartyl-L-prolyl-L-prolyl-L-lysyl-L-methionyl-L-glutaminyl-L-threonyl-L-aspartic acid L-Aspartic acid, L-alanyl-L-valyl-L-glutaminyl-L-seryl-L-lysyl-L-prolyl-L-prolyl-L-seryl-L-lysyl-L-arginyl-L-alpha-aspartyl-L-prolyl-L-prolyl-L-lysyl-L-methionyl-L-glutaminyl-L-threonyl- Systemin