GBE1 (glucan (1,4-alpha-), branching enzyme 1) is essential for the globular and branched structure of glycogen, increasing solubility by creating a hydrophilic surface and reducing intracellular osmotic pressure. It may serve as a potential therapeutic target for treating LUAD(PMID: 31221150). The full sequence can be further processed into a mature form of 75 kDa.