Lessons from the Tobacco Mosaic Virus

By Rosalind Franklin

When I turned my attention from DNA to viruses, I discovered that the challenges of molecular biology are matched only by the elegance of its solutions. My current work focuses on the tobacco mosaic virus (TMV), a rod-shaped RNA virus that has provided unexpected insights into the structure and function of biological molecules.

Using X-ray diffraction, I’ve revealed that TMV has a helical structure, much like DNA, but with a unique twist—its RNA is embedded within the protein coat, forming a tightly packed assembly. This arrangement raises fascinating questions about how viruses encode and transmit genetic information.

Viruses are both a marvel and a menace. They teach us how life operates at its most basic level while reminding us of our vulnerabilities. By understanding their structures, we may one day develop vaccines or antiviral treatments that save lives. For me, the pursuit of this knowledge is a reflection of my broader belief: that science, at its best, serves to illuminate the unknown for the betterment of all.