From chemical embryology to nucleosome patterning - an interview with Roumen G. Tsanev.

Roumen Tsanev was a prominent Bulgarian scientist whose pioneering ideas about the role for chromatin in cell differentiation and development led him to propose the first hypothesis for epigenetic information based on a histone code. To test experimentally his ideas, Dr.Tsanev explored nucleosome structure and heterogeneity and generated seminal data on nucleosome segregation in replicating chromatin.