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A putative lipase, LipS, from the soil metagenome of an environmental sample taken at the Biocenter Klein Flottbek, Hamburg, Germany was cloned, expressed and purified. Two different constructs of the protein were crystallized in a search for well diffracting crystals. Preliminary X-ray analyses indicated that crystals in space groups P42212 and P4 diffracted X-ray radiation to 2.8 and 2.0 Å resolution, respectively.
Keywords: lipases; metagenome.

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M. tuberculosis succinyl-diaminopimelate desuccinylase, the enzyme which catalyzes the seventh step of the lysine-biosynthesis pathway, has been cloned, expressed, purified and crystallized. Preliminary X-ray diffraction analysis indicated the presence of pseudo-merohedral twinning in space group P21, resulting in possible emulation of space group C2221.
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