@article{mbs:/content/journal/micro/10.1099/00221287-99-2-379, author = "Weller, H. and Haug, A.", title = "Effects of Ca2+ and K+ on the Physical State of Membrane Lipids in Thermoplasma acidophila", journal= "Microbiology", year = "1977", volume = "99", number = "2", pages = "379-382", doi = "https://doi.org/10.1099/00221287-99-2-379", url = "https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-99-2-379", publisher = "Microbiology Society", issn = "1465-2080", type = "Journal Article", abstract = "Summary: Thermoplasma acidophila, a mycoplasma-like organism, was grown at 56 °C and pH 2. The microfluidity of membrane vesicles was determined for the temperature range −2 to 35 °C using spin labels. The temperature at which the low-temperature phase transition occurred in membrane lipids increased with increasing Ca2+ concentration. However, there was no evidence of a low-temperature lipid phase transition for membrane vesicles suspended in a medium containing monovalent instead of bivalent cations.", }