The respiratory properties of isolated mitochondria from P. cyclopium were studied with particular attention to their response to calcium ions. The results obtained indicate concentration dependent stimulation of NADH oxidation by calcium ions. Similar effects could also be obtained with other divalent cations.
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Ugalde, U.O., Pitt, D. Properties of mitochondria from Penicillium cyclopium and their response to calcium and other divalent cations. Antonie van Leeuwenhoek 54, 221–228 (1988). https://doi.org/10.1007/BF00443580