The prepared samples for the original lentil variety (L8) and its γ-irradiated mutant lines were analyzed for their DPP-IV inhibitory activities using a DPP-IV inhibitor screening assay kit (Cayman Chemical, Ann Arbor, MI, USA). The kit provides a fluorescence-based method for screening DPP-IV inhibitors and the assay procedure is described in our previous studies [48 (link),49 (link)].
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