https://en.wikipedia.org/wiki/Mycoplasma_laboratorium https://en.wikipedia.org/wiki/Mycoplasma_laboratorium describes the closest we've gotten; synthesizing the

https://en.wikipedia.org/wiki/Mycoplasma_laboratorium https://en.wikipedia.org/wiki/Mycoplasma_laboratorium describes the closest we've gotten; synthesizing the DNA and swapping it into an existing cell which then propagates the synthetic gene line.