Bachelor of Science, Banaras Hindu University, Varanasi, India, 1979. Master of Science, Banaras Hindu University, Varanasi, India, 1982. Doctor of Philosophy in Biochemistry, Banaras Hindu University, Varanasi, India, 1987.
He is Fellow of National Academy of Sciences, India and National Academy of Agricultural Sciences, India. Kayastha has long association to the campus of Banaras Hindu University (Banaras Hindu University). He earned his Bachelor of Science (1979) and Master of Science
(Biochemistry) (1982) from the Faculty of Science, Banaras Hindu University.
He did Undergraduate Diploma in German Language from Department of German Studies, Banaras Hindu University in 1983. Kayastha earned his postdoctoral research experiences at National Institutes of Health, Bethesda, Maryland, United States of America and also at University of California, Riverside, California, United States of America. After having postdoctoral research experiences in National Institutes of Health and University of California United States of America, Kayastha returned to India and decided to join his Alma mater Banaras Hindu University as a faculty.
He joined School of Biotechnology as a faculty in October, 1990. He became full Professor at School of Biotechnology in October, 2007.
Presently, he is Coordinator of School of Biotechnology (Banaras Hindu University) since May, 2013.
He was also Coordinator of Centre of Bioinformatics, School of Biotechnology (2010-2013). Kayastha has mentored 16 Doctor of Philosophy scholars from his laboratory at Banaras Hindu University.
Editorial Board Member of Protein and Peptide Letters (Bentham Science Publishers). Oriental Pharmacy and Experimental Medicine (KHU Press, of Korea). Associate Editor, Journal of Plant Biochemistry and Biotechnology (Springer).
Founder Editor, Journal of Proteins and Proteomics, (Serials ) and Associate Editor, Agricultural Research (Springer).
Married Ritu Bakshi, January 2, 1989.