 Sinicococcus along with PCC7942 has been found to have the potential to produce glucose directly from photosynthesis without the need for any additional enzyme or transportation genes. This was achieved by knocking out two genes involved in glucose metabolism, resulting in the intracellular accumulation of glucose and the subsequent development of a spontaneous mutation in the genome. This mutation led to the secretion of up to five grams of glucose per liter of culture, which could then be further improved upon with metabolic and cultivation engineering. This study demonstrates the plasticity of cyanobacteria and its potential application in supporting the direct photosynthetic production of glucose. This article was authored by Shan Shan Zhong, Jia Hui Sun, Dandan Feng, and others.