A steroid is a biologically active organic compound with four rings arranged in a specific molecular configuration. Steroids have two principal biological functions: as important components of cell membranes which alter membrane fluidity; and as signaling molecules. Hundreds of steroids are found in plants, animals and fungi. All steroids are manufactured in cells from the sterols lanosterol (opisthokonts) or cycloartenol (plants). Lanosterol and cycloartenol are derived from the cyclization of the triterpene squalene.The steroid core structure is typically composed of seventeen carbon atoms, bonded in four "fused" rings: three six-member cyclohexane rings (rings A, B and C in the first illustration) and one five-member cyclopentane ring (the D ring). Steroids vary by the functional groups attached to this four-ring core and by the oxidation state of the rings. Sterols are forms of steroids with a hydroxy group at position three and a skeleton derived from cholestane.Steroids can also be more radically modified, such as by changes to the ring structure, for example, cutting one of the rings. Cutting Ring B produces secosteroids one of which is vitamin D3.
Last Updated on: Oct 06, 2024List of Open Access Journals View More
Journal of Cardiology Research and Endovascular Therapy
The journal focus includes cardiac diseases, cardiovascular surgeries, pathophysiology, screening and epidemiology, vascular diseases, embolic protection, imaging technologies and electrophysiology, drug-eluting stents etc. JCRET articles will be strictly peer-reviewed through double blind...View More
Journal of Rehabilitation Research Current Updates
JRRCU publishes original, current research, clinical studies, novel methods, advancing concepts on Orthopaedics, Geriatric, Trauma, Neuropsychological Rehabilitation, Palliative care, psychology, etc....View More
Journal of Next Generation Materials Engineering Research
JNGMER welcome authors to contribute current research and reports manuscripts related to Thermal Engineering, Environmental Catalysis, Reaction kinetics, Physical Chemistry, Catalysis & Adsorption, Processes of Heat, Momentum Transfer, Nanocatalysis, Reactor Engineering, Reactor Designs and Materials, and Thermodynamic Engineering, etc...View More
Clinical Trials and Medical Case Reports
Clinical trials and Medical Case reports is an open access peer reviewed journal. It publishes Clinical trials, Medical case reports and Medical images from all fields of medicine in all orders by which medicinal services experts, specialists and others can easily understand the disease conditions...View More
International Journal of Quantum Technologies
International Journal of Quantum Technologies publishes original, current research, novel methods, advancing research on quantum optics, modern quantum physics, quantum computing, Quantum electromechanical systems and quantum metrology, etc. strategies that will drive positive change in the worldwide....View More
Health and Preventive Medicine Journal
Health and Preventive Medicine Journal (HPMJ) is a scholarly open access peer-reviewed journal aim to publish be valuable source of information both experimental and theoretical in field of Health science, Epidemiology, Health management and Preventive medicine...View More