Corynebacterium glutamicum is equipped with four secondary carriers for compatible solutes: Identification, sequencing, and characterization of the proline/ectoine uptake system ProP and the ectoine/proline/glycine betaine carrier EctP - Peter, Heidi; Weil, Brita; Burkovski, Andreas; Krämer, Reinhard; Morbach, Susanne (Journal of Bacteriology, 1998)