L-别异亮氨酸是一种支链氨基酸，是L-异亮氨酸的立体异构体。它是人体血浆的常见成分（尽管含量较低）。 L-别异亮氨酸是异亮氨酸转氨作用的副产物。血浆L-别异亮氨酸源自体内L-异亮氨酸，可用于诊断枫糖浆尿病（MSUD），一种遗传性疾病。

6H-Dibenzo[a,g]quinolizine-2,3,9,10-tetrol,5,8,13,13a-tetrahydro-,(13aS)-

Activator of protein kinase C; attached to cell permeabilization Antennapedia domain vector peptide. Consists of peptide derived from the C2 domain of PKC β linked by a disulfide bridge to the Antennapedia domain vector peptide. The Antennapedia peptide is actively taken up by intact cells, at 4 or 37°C, ensuring rapid and effective uptake of the activator peptide. Once inside the cell, the disulfide bonds are subjected to reduction in the cytoplasm leading to release of the activator peptide.