Abstract: A method for converting a carbon source into serine includes: synthesizing a DNA sequence; implanting the DNA sequence into a plasmid, so that the plasmid includes gene sequences of SEQ ID NO: 1, SEQ ID NO: 2, and SEQ ID NO: 3; implanting the plasmid into cyanobacteria through an electroporation treatment, so as to obtain modified cyanobacteria; and providing the carbon source to the modified cyanobacteria, so that the modified cyanobacteria convert the carbon source into the serine.

Abstract: A method for producing phosphatidylethanolamine with use of a carbon source includes: cultivating modified cyanobacteria, in which the modified cyanobacteria are cultivated in a liquid medium; undergoing a photo-fermentation process, in which the carbon source is provided to the modified cyanobacteria, so that the modified cyanobacteria convert the carbon source into serine; undergoing a filtration process, in which the liquid medium is filtered for separating the modified cyanobacteria, so as to obtain the filtered liquid medium; synthesizing the phosphatidylethanolamine, in which the filtered liquid medium and the serine are mixed with a lecithin and a phospholipase in a photoreactor, so as to obtain a phosphatidylethanolamine mixture; and undergoing an oil-water separation process, in which the phosphatidylethanolamine mixture is placed in an oil water separator and left to rest for a predetermined period of time, and the phosphatidylethanolamine is obtained from an upper layer of the phosphatidylethanolam

Abstract: A method for cultivating cyanobacteria includes: providing the cyanobacteria; subjecting the cyanobacteria to physical mutagenesis, so as to obtain primary mutant cyanobacteria; subjecting the primary mutant cyanobacteria to chemical mutagenesis, so as to obtain secondary mutant cyanobacteria; and subjecting the secondary mutant cyanobacteria to a temperature resistance test and an environment resistance test, so as to obtain target cyanobacteria. A fatality rate of the physical mutagenesis ranges between 50% and 80%, and a fatality rate of the chemical mutagenesis ranges between 40% and 55%.

Abstract: Described herein are genetically-modified microorganisms for producing long-chain dicarboxylic acids and methods of using the microorganisms. The microorganisms contain a first nucleic acid encoding an Umbellularia californica lauroyl ACP-thioesterase (BTE) operably linked to a promoter or a second nucleic acid encoding a Cocos nucifera lauroyl ACP-thioesterase (FatB3) operably linked to a promoter.

Abstract: Described herein are genetically-modified microorganisms for producing long-chain dicarboxylic acids and methods of using the microorganisms. The microorganisms contain a first nucleic acid encoding an Umbellularia californica lauroyl ACP-thioesterase (BTE) operably linked to a promoter or a second nucleic acid encoding a Cocos nucifera lauroyl ACP-thioesterase (FatB3) operably linked to a promoter.