The Mempans were a conquered people in the Klingon Empire. They were humanoid, with long limbs. They had a reputation for expertise in genetic engineering, ranging from enhancing various humanoid traits to increasing crop yields. The Albino raided them often for their genetic research. An outpost on Mempa II was working with isomiotic hypodermics to treat cancers and neural disorders. (TOS novel: Excelsior: Forged in Fire)