He has had visiting professorships at UC Berkeley; University of Chieti, Italy; University of Perugia, Italy; the Scripps Research Institute, La Jolla, California; and the Collège de France, Paris[2] He has fulfilled roles in numerous professional organizations, including the Swedish Biochemical Society (secretary 1976–1982); Chairman of the Swedish National Committee on Biochemistry, Royal Swedish Academy of Sciences, 1988–1990; Chairman Scientific Program Committee for the 22nd Meeting of the Federation of European Biochemical Societies, FEBS 1993; editorial boards of the Biochemical Journal, ChemBioChem, Biochimica et Biophysica Acta, Protein Engineering Design and Selection, the Journal of Biological Chemistry.
His interest in glutathione transferases continued until the last years of his research, for example studies of their role as efficient ketosteroid isomerases[10] and as enzymes involved in the biosynthesis of moulting hormones in mosquitoes transmitting malaria and yellow fever.
[11] In addition to the work directed specifically at enzymes involved in glutathione metabolism and detoxication,[12] Mannervik coauthored texts on molecular toxicology.
[13][14] He also studied various more general aspects of enzymology, including graphical analysis,[15] error structure of kinetic experiments,[16] weighting of observations,[17][18] regression methods,[19] directed enzyme evolution,[20] and discrimination between models.
In 1988 he won the competition among 20 applicants for the internationally advertised Karin and Herbert Jacobsson Professorship of Biochemistry at Uppsala University, originally held by Nobel Prize Laureate Arne Tiselius.