L-Threonine, L-a-aspartyl-L-valyl-L-threonyl-L-histidyl-L-leucyl-L-threonyl-L-asparaginyl-L -a-aspartyl-L-valyl-L-threonyl-L-histidyl-L-leucyl-L-threonyl-L-asparaginyl-L- a-aspartyl-L-valyl-L-threo