Medical laboratory technologists and technicians can obtain a general certification as a medical laboratory technologist or technician, respectively, or a certification in a specialty, such as cytotechnology or medical biology.
Ergosterol (ergosta-5,7,22-trien-3Î²-ol) is a sterol found in cell membranes of fungi and protozoa, serving many of the same functions that cholesterol serves in animal cells.ecause ergosterol is present in cell membranes of fungi, yet absent in those of animals, it is a useful target for antifungal drugs. Ergosterol is also present in the cell membranes of some protists, such as trypanosomes. This is the basis for the use of some antifungals against West African sleeping sickness.
Steroids, such as the hormones estrogen and testosterone, are also considered to be sterols. Ergosterol is a fungal sterol whose synthesis serves as a target for antifungal drugs, while phytosterols are plant compounds that are sterols. Hopanoids are bacterial compounds that share some similarities with sterols.teroids, such as the hormones estrogen and testosterone, are also considered to be sterols. Ergosterol is a fungal sterol whose synthesis serves as a target for antifungal drugs, while phytosterols are plant compounds that are sterols. Hopanoids are bacterial compounds that share some similarities with sterols.