Sterols are a subgroup of steroids with a hydroxyl group at the 3-position of the A-ring. [14] They are amphipathic lipids synthesized from acetyl-coenzyme A via the HMG-CoA reductase pathway. The overall molecule is quite flat. The hydroxyl group on the A ring is polar. The rest of the aliphatic chain is non-polar.

2023年7月19日 · What are sterols and stanols, and how can they lower your cholesterol? Find out what foods they’re in and who can benefit most from more of them in their diet.

Plant sterols are substances that are similar to cholesterol but are made in plants. They're found in the highest amounts in vegetable oils, nuts, and seeds. Plant sterols might help reduce...

固醇（英文：sterol）又称甾醇，是 类固醇 的一类，是含有 羟基 的类固醇。 它们均以 环戊烷多氢菲 为基本结构，并含有羟基，故称为固醇类化合物。 用 碱性溶液 提取动植物组织中的脂类，其中常有多少不等的、不能为碱所皂化的物质。 固醇类化合物种类繁多，广泛分布于生物界。 如 胆固醇 是高等 动物细胞 的重要组分。 它与 长链脂肪酸 形成的胆固醇酯是 血浆脂蛋白 及细胞膜的重要组分。 植物细胞 膜则含有其它固醇如 豆固醇 及谷固醇。 真菌和酵母则含有菌固醇。 一类 …

固醇[1] （英語： sterol）又称 甾 zāi 醇， 固醇类[2] （sterols）属于 類固醇 的一个 子群，是一组源自 类固醇 骨架并在C-3上有一个β取向 羟基 的天然产物，结构上与胆固烷-3-醇 [3] （cholestan-3-ol）高度相关 [4][5]。 广义上的固醇，包括最简单的腺甾醇（gonan-3-ol）；而狭义上的固醇，还需在C-17上有一个约8～10碳原子的烃侧链 [6][7][8]。 固醇是最早发现的类固醇化合物 [9]，自然界中分布甚广，它们存在于大多数真核细胞的膜中，与最家喻户晓的动物固醇——胆固醇，一起 …

2023年9月21日 · What are sterols? Sterols are organic compounds derived from gonane with \(\ce{H}\) #3 replaced with an alcohol (\(\ce{-OH}\)) group. The sterols are a sub-class of steroids. The simplest sterol is the alcohol gonane shown in the figure on the right. Other sterols have other groups attached to the gonane structure.

Sterols are a diverse class of lipids that play key roles in the structure and function of cell membranes in living organisms. Examples of sterols include cholesterol, plant sterols, and ergosterol, each of which has unique properties and biological functions.

Plant sterols are steroidal alkaloids that differ from cholesterol in their side chain at C-24 (methyl or ethyl group) or with an additional double bond in C-22, while plant stanols are 5α-saturated derivatives of plant sterols .

Plant stanols and sterols, also known as phytosterols, are cholesterol-like compounds that are found naturally in a range of plant-based foods including vegetable oils, grain products such as breads and cereals, seeds, nuts, legumes, and fruits and vegetables.

Sterols are a subgroup of steroids containing a hydroxyl group at the C 3 position and a branching side chain at the C 17 position. The predominant sterols in red algae, including the genus Gracilaria, are cholesterol and its derivatives, for example, desmosterol, cholesta‑4,6‑dien‑3‑ol, and cholest‑5‑ene‑3,7‑diol [221–223, 316].