@article{mbs:/content/journal/micro/10.1099/00221287-9-3-434, author = "Conner, R. L. and Van Wagtendonk, W. J. and Miller, C. A.", title = "The Isolation from Lemon Juice of a Growth Factor of Steroid Nature required for the Growth of a Strain of Paramecium aurelia", journal= "Microbiology", year = "1953", volume = "9", number = "3", pages = "434-439", doi = "https://doi.org/10.1099/00221287-9-3-434", url = "https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-9-3-434", publisher = "Microbiology Society", issn = "1465-2080", type = "Journal Article", abstract = "SUMMARY: A steroid fraction obtained from lemon juice was found to be an essential metabolite for Paramecium aurelia, var. 4, stock 51.7 (s), in axenic culture. This steroid is closely related to, or is identical with, either β-sitosterol or γ-sitosterol.", }