User:DoroWolf/沙盒/麦芽糖
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Maltose (/ˈmɔːltoʊs/[1] or /ˈmɔːltoʊz/[2]), also known as maltobiose or malt sugar, is a disaccharide formed from two units of glucose joined with an α(1→4) bond. In the isomer isomaltose, the two glucose molecules are joined with an α(1→6) bond. Maltose is the two-unit member of the amylose homologous series, the key structural motif of starch. When beta-amylase breaks down starch, it removes two glucose units at a time, producing maltose. An example of this reaction is found in germinating seeds, which is why it was named after malt.[3] Unlike sucrose, it is a reducing sugar.[4]
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DoroWolf/沙盒/麦芽糖 | |
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IUPAC名 (3R,4R,5S,6R)-6-(hydroxymethyl)-5-{[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}oxane-2,3,4-triol | |
别名 | 4-O-α-D-Glucopyranosyl-D-glucose |
识别 | |
CAS号 | 69-79-4 Y |
PubChem | 6255 |
ChemSpider | 388329 α-maltose, 6019 β-maltose |
SMILES |
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InChI |
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ChEBI | 17306 |
KEGG | D00044 |
性质 | |
化学式 | C12H22O11 |
摩尔质量 | 342.3 g·mol−1 |
外观 | White powder or crystals |
密度 | 1.54 g/cm3 |
熔点 | 160 to 165 °C(表达式错误:无法识别词语“to”。 K) |
溶解性(水) | 1.080 g/mL (20 °C) |
[α]20 D |
+140.7° (H2O, c = 10) |
相关物质 | |
相关化合物 | Sucrose Lactose Trehalose Cellobiose |
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。 |
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