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G. N. Ramachandran

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Gopalasamudram Narayanan Ramachandran was a pioneering Indian physicist. He made massive contributions to both physics and biology. His work helped scientists understand the complex shapes of biological molecules. These shapes are essential to how living things function. Most importantly, he created tools to map the structure of proteins.

Ramachandran used a technique called X-ray diffraction to study tiny structures. This method involves hitting a sample with X-rays to see its shape. In 1954, he and Gopinath Kartha used this to study collagen. Collagen is a vital protein in the body. They discovered it has a triple-helical structure. This means the protein consists of three strands twisted together like a rope.

After studying collagen, Ramachandran wanted to find a more general way to study molecules. He wanted to create a "yardstick" for all peptide conformations. A peptide is a small chain of amino acids. In 1962, he completed a series of complex calculations. These calculations resulted in the Ramachandran plot. This tool was published in the Journal of Molecular Biology in 1963. It remains an essential tool for studying protein conformation, which is the specific shape a protein takes.

Ramachandran's academic journey was very distinguished. He was born on October 8, 1922, in Ernakulam, Kingdom of Cochin. He earned his BSc honours in Physics from St Joseph's College in 1939. He later joined the Indian Institute of Science in Bangalore. There, he studied under the Nobel laureate C. V. Raman. Between 1947 and 1949, he worked at the Cavendish Laboratory in Cambridge. He earned his PhD there by studying X-ray diffuse scattering.

His research helped bridge many different scientific fields. He brought together X-ray crystallography, peptide synthesis, and NMR studies. Molecular biophysics is the field that combines physics and biology to study molecules. In 1970, he founded the Molecular Biophysics Unit at the Indian Institute of Science. This unit later became the Centre of Advanced Study in Biophysics. His work helped turn separate ideas into one connected science.

Ramachandran also improved medical imaging technology. Along with A.V. Lakshminarayanan, he developed convolution-backprojection algorithms. These are mathematical rules used in X-ray tomography. Tomography is a way to create images of the inside of an object. Their algorithms made image reconstruction much faster. They also made the images more numerically accurate. Because of this, manufacturers could build scanners that produced nearly perfect, high-resolution images.

Many prestigious organizations recognized his scientific brilliance. He received the Shanti Swarup Bhatnagar Award in 1961. He was also named a Fellow of the Royal Society of London. In 1999, he won the Ewald Prize from the International Union of Crystallography. He was even nominated for the Nobel Prize for his work on protein structure.

Ramachandran's later years were difficult. He suffered from Parkinson's disease and a stroke. He also faced the loss of his wife, Rajalakshmi, in 1998. He died in Chennai on April 7, 2001, at the age of 78. Today, his legacy continues through the G. N. Ramachandran Gold Medal. The Council of Scientific and Industrial Research awards this medal for excellence in biological sciences and technology.

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