1 Expression, purification and crystallisation of neuro- and cytoglobin Sylvia Dewilde 1* , Kirsten Mees 1 , Laurent Kiger 2 , Christophe Lechauve 2 , Michael C. Marden 2 , Alessandra Pesce 3 , Martino Bolognesi 4 , Luc Moens 1 , 1 Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium 2 INSERM U779, 78 rue du General Leclerc, 94275 Le Kremlin-Bicetre, France 3 Department of Physics CNR-INFM and Center for Excellence in Biomedical Research, University of Genova, I-16146 Genova, Italy. 4 Department of Biomolecular Sciences and Biotechnology CNR-INFM, University of Milano, Via Celoria 26, I-20133 Milano, Italy. *Corresponding author: Dr. Sylvia Dewilde Department of Biomedical Sciences University of Antwerp, Campus Drie Eiken Universiteitsplein 1, B2610 Antwerp, Belgium Tel: +32 38202392 Fax: +32 3 8202248 E-mail: sylvia.dewilde@ua.ac.be Running title: Purification of neuro- and cytoglobin.