数据之源，洞见之始

|FRAME: Phthiocerols Phthiocerol|-based lipids and glycolipids have been found in many species of |FRAME: TAX-1762|, including |FRAME: TAX-1773|, |FRAME: TAX-1765|, |FRAME: TAX-33894|, |FRAME: TAX-1781|, |FRAME: TAX-1768|, |FRAME: TAX-1777|, |FRAME: TAX-1769| and |FRAME: TAX-1809| |CITS: [3149973]|.Phthiocerols comprise a linear carbohydrate molecule to which one methoxyl group, one methyl group, and two secondary hydroxyl groups are attached. Two types of phthiocerols have been described. In |FRAME: Phthiocerol-A "phthiocerol A"| the methoxyl and methyl groups are attached at positions 3 and 4, respectively, and the hydroxyl groups are at positions 9 and 11. In |FRAME: Phthiocerol-B "phthiocerol B"| a methyl group is missing from the beginning of the molecule, and thus the methoxyl and methyl groups are attached at positions 2 and 3, respectively, and the hydroxyl groups are at positions 8 and 10.The two hydroxyl groups serve as attachment points for fatty acids, in a manner analogous to the much more ubiquitous sn-glycerol. The phthiocerol molecules have a range of 28 to 34 carbon atoms in the main chain, indicating a promiscuity of the enzymes involved in their biosynthesis. Longer molecules have additional carbon atoms added at the ω end of the molecule.In most organisms the two hydroxyl groups are esterified by |FRAME: Mycocerosic-Acids "mycocerosic acids"|. In |FRAME: TAX-1781| and |FRAME: TAX-1809|, however, they are esterified by |FRAME: Phthioceranic-Acids "phthioceranic acids"| |CITS: [3149973][3113946]|.

|FRAME: Phthiocerols Phthiocerol|-based lipids and glycolipids have been found in many species of |FRAME: TAX-1762|, including |FRAME: TAX-1773|, |FRAME: TAX-1765|, |FRAME: TAX-33894|, |FRAME: TAX-1781|, |FRAME: TAX-1768|, |FRAME: TAX-1777|, |FRAME: TAX-1769| and |FRAME: TAX-1809| |CITS: [3149973]|.Phthiocerols comprise a linear carbohydrate molecule to which one methoxyl group, one methyl group, and two secondary hydroxyl groups are attached. Two types of phthiocerols have been described. In |FRAME: Phthiocerol-A "phthiocerol A"| the methoxyl and methyl groups are attached at positions 3 and 4, respectively, and the hydroxyl groups are at positions 9 and 11. In |FRAME: Phthiocerol-B "phthiocerol B"| a methyl group is missing from the beginning of the molecule, and thus the methoxyl and methyl groups are attached at positions 2 and 3, respectively, and the hydroxyl groups are at positions 8 and 10.The two hydroxyl groups serve as attachment points for fatty acids, in a manner analogous to the much more ubiquitous sn-glycerol. The phthiocerol molecules have a range of 28 to 34 carbon atoms in the main chain, indicating a promiscuity of the enzymes involved in their biosynthesis. Longer molecules have additional carbon atoms added at the ω end of the molecule.In most organisms the two hydroxyl groups are esterified by |FRAME: Mycocerosic-Acids "mycocerosic acids"|. In |FRAME: TAX-1781| and |FRAME: TAX-1809|, however, they are esterified by |FRAME: Phthioceranic-Acids "phthioceranic acids"| |CITS: [3149973][3113946]|.