胆色素（bilin），亦译 后胆色素类 （bilichrome），一种 生物色素，是某些 卟啉 (porphyrin)代谢中形成的黄色、绿色、红色或褐色非金属化合物系列之一。 除出现于 兽类 的胆色素中以外， 无脊椎动物 、低等 脊椎动物 、 红藻 和 绿色植物 中也有这种色素类。 它不仅给动物体某些部位或其产物以不同的颜色，而且也是绿色植物 光周期 中不可缺少的，也是红藻光合作用过程中的 辅助色素。 胆色素（bile pigment）是动物胆汁的主要基本成分之一，由棕黄色的 胆红素 和青绿色的 …

A number of pigments are present in bile. The two chief pigments are bilirubin (golden-yellow) and biliverdin (green). Bilirubin (C 33 H 36 N 4 O 6) is the chief pigment of human and carnivorous bile. Biliverdin (C 33 H 36 N 4 O 8) is the oxidation product of bilirubin. It is present chiefly in the bile of birds and of herbivorous animals.

Bile (from Latin bilis), or gall, is a yellow-green/misty green fluid produced by the liver of most vertebrates that aids the digestion of lipids in the small intestine. In humans, bile is primarily composed of water, is produced continuously by the liver, …

Bilins, bilanes or bile pigments are biological pigments formed in many organisms as a metabolic product of certain porphyrins. Bilin (also called bilichrome) was named as a bile pigment of mammals, but can also be found in lower vertebrates, invertebrates, as well as red algae, green plants and cyanobacteria. Bilins can range in color from red ...

Bile is a complex alkaline fluid (pH=7.0–7.7), containing inorganic salts (chlorides, carbonates, bicarbonates, and phosphates of Na+, K+, and Ca2+), bile salts (sodium taurocholate and sodium glycocholate), bile pigments (bilirubin), cholesterol, lecithin, and traces of fatty acids and soaps.

The bile pigments are formed by decomposition of the porphyrin ring and contain a chain of four pyrrole rings. Bilirubin, for example, the brownish yellow pigment that gives feces its characteristic colour, is the end product of the breakdown of heme from destroyed red blood cells.

2020年1月1日 · Bilirubin, the major yellow pigment in plasma, is the degradation product of heme, the iron-containing tetrapyrrole chromophore of hemoglobin and several important enzymes. Because of its internal hydrogen bonding, bilirubin is insoluble in …

2012年3月8日 · The bile pigments, biliverdin, and bilirubin, are endogenously derived substances generated during enzymatic heme degradation. These compounds have been shown to act as chemical antioxidants in vitro. Bilirubin formed in tissues circulates in the serum, prior to undergoing hepatic conjugation and biliary excretion.

2022年9月11日 · The liver cells excrete a number of substances. Among the most important of these are bile pigments “bilirubin and biliverdin”, which are the major end-products of hemoglobin and myoglobin metabolism. They have no digestive function. The normal concentration of bile pigments is about 0.2-0.8 mg/ 100 ml of plasma.

2023年2月11日 · These pigments, primarily bilirubin, are derived from the breakdown of hemoglobin, the protein responsible for carrying oxygen in red blood cells. In this article, we will explore the production of bile pigments, the steps involved in their synthesis, and their significance in overall liver function.