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Hallmann, A. and Sumper, Manfred (1994) An inducible arylsulfatase of Volvox carteri with properties suitable for a reporter-gene system. Purification, characterization and molecular cloning. European journal of biochemistry = EJB: The FEBS journal 221 (1), pp. 143-150.
Hallmann, A. and Sumper, Manfred (1994) Reporter genes and highly regulated promoters as tools for transformation experiments in Volvox carteri. Proc. Nati. Acad. Sci. USA (PNAS) 91 (24), pp. 11562-11566.
Ertl, H. and Hallmann, A. and Wenzl, S. and Sumper, Manfred (1992) A novel extensin that may organize extracellular matrix biogenesis in Volvox carteri. The EMBO journal 11 (6), pp. 2055-2062.