The structure (abbreviated) of the polysaccharide cellulose, a major structural component of plant cell walls, wood. It is just an unbranched polymer of beta-glucose. Only a small fragment of the potentially infinite polymer is shown. Drawn in Inkscape. 纤维素 多糖 糖 纤维素
The structure a triacyglicerol, a.k.a fat. This fat molecule possesses three identical, saturated fatty acid (palmitic acid) units, linked to a glycerol molecule. Drawn in Inkscape. 脂肪 甘油三酯 甘油三酯 脂肪分子
The abbreviated structure of the storage polysaccharide starch; just a short segment shown (starch is a long, potentially infinite, polymer of alpha-glucose molecules). Unbranched starch, like the one drawn here, is called amylose. Drawn in Inkscape. 淀粉 多糖 糖 淀粉
The structure (abbreviated) of the structural polysaccharide chitin, a major component of the exoskeleton of arthropods (spiders, crustaceans, insects, etc.) and of the cell wall of fungi. It is similar to cellulose, but with a different side group on the carbon 2 of glucose. Absorbable surgical thread can be made of this material. Only a small fragment of the potentially infinite polymer is shown. Drawn in Inkscape. 甲壳素 多糖 糖 甲壳素
The simplified "cloverleaf" tRNA structure (from genome sequence of the bacterium Gardnerella vaginalis, as predicted by tRNAscan) for the glycine amino acid (GCC anticodon). Drawn in Inkscape. 转让 科学 生物学 转移 RNA
A simple balls-and-sticks model of a caffeine molecule. Oxygen is red, carbon is blue-grey, nitrogen gree; hydrogens not shown. Drawn in Inkscape. 分子 模型 咖啡因 咖啡因分子
The structure (abbreviated) of the disaccharide sucrose, a.k.a. common sugar (the one used in the kitchen). It is the polymer of an alpha-glucose and a fructose units. Drawn in Inkscape. 蔗糖 糖 双糖 蔗糖 (制糖)
The simplified "cloverleaf" tRNA structure (from genome sequence of the bacterium Gardnerella vaginalis, as predicted by tRNAscan) for the glycine amino acid (GCC anticodon). Different parts of the structure highlighted and tagged. Drawn in Inkscape. 转让 科学 生物学 转移 RNA 2