The effect of CO 2 on anaerobic succinate production by 1 Corynebacterium glutamicum : carbon flux analysis by 2 13 C-NMR 3 4 5 6

5 6 Dušica Radoš, David L. Turner, Luís L. Fonseca, Ana Lúcia Carvalho, 7 Bastian Blombach, Bernhard Eikmanns, Ana Rute Neves and Helena 8 Santos* 9 10 Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. da República – 11 EAN, 2780-157 Oeiras, Portugal. 12 Institute for Biochemical Engineering, University of Stuttgart, Allmandring 31, 13 70569 Stuttgart, Germany. 14 Institute of Microbiology and Biotechnology, University of Ulm, Albert-Einstein-Allee 11, 15 89081 Ulm, Germany. 16 17