Definition: Acrolein is an extremely small, single-stranded DNA molecule. It was first identified in 1983 by Dr. Martin J. Harnett at the University of Texas Health Science Center at Dallas, then known as UT Southwestern Medical School. This tiny piece of genetic code can be found on the surface of many different types of bacteria, including Escherichia coli and Klebsiella pneumoniae. Acrolein has a role in bacterial cell壁的 structure and function. It plays an important role in preventing the growth of bacteria by binding to their outer membrane protein (also known as peptidoglycan or glycan). This prevents the bacteria from entering the cell, making it difficult for them to grow and multiply. Acrolein is also essential for many bacterial functions, such as signaling pathways that help bacteria respond to nutrients and energy inputs. It plays a crucial role in controlling various physiological processes such as motility, protein synthesis, and energy production. As an example, this tiny molecule can be found in the cell walls of some bacteria (e.g., Staphylococcus aureus), which are essential for its function in bacterial physiology. But it doesn't just operate alone on its own—it's part of a larger network called the peptidoglycan system, which also includes other molecules that help with communication and regulation. In summary, acrolein is a small DNA molecule with an important role in bacterial cell壁的结构和功能，它与细菌的外膜蛋白（也被称为脂多糖或糖蛋白）共同作用，防止细菌进入细胞，并使它们难以繁殖。此外，它还参与许多细菌的功能，如在营养输入和能量生成方面控制生理过程。

acroleins