Porphyran

Porphyran is a sulfated carbohydrate dervied from red algae of the genus Porphyra.

Porphyran is a complex sulfated carbohydrate. It is a highly substituted agarose with a linear backbone consisting of 3-linked beta-D-galactosyl units alternating with either 4-linked alpha-L-galactosyl 6-sulfate or 3,6-anhydro-alpha-L-galactosyl units. The composition includes 6-O-sulfated L-galactose, 6-O-methylated D-galactose, L-galactose, 3,6-anhydro-L-galactose, 6-O-methyl D-galactose and ester sulfate. Some of the ester is present as 1-4-linked L-galactose 6-sulfate. The precise composition of porphyran shows seasonal and environmental variations. In Porphyra haitanensis, the L-residues are mainly composed of alpha-L-galactosyl 6-sulfate units, and the 3,6-anhydro-galactosyl units are minor. In Porphyra capensis, the ratio of alpha-L-galactose-6-sulfate and the 3,6-anhydrogalactose is 1.2:1.

单词	porphyran
释义	porphyran 英汉-汉英词典 n. 金属卟啉词组 \| 习惯用语您要查找的是不是： orphanage n. 孤儿院 pornography n. 色情描绘, 色情表演色情作品 paraphrase n. 释义；改述；演释曲 vt. 改述 porphyry n. [地]斑岩 porphyran 金属卟啉; 紫菜聚糖; 英语例句库 We found that porphyran is a kind of good material for optical limiter. 研究发现，卟啉类反饱和吸收材料有很好的光限幅作用。声明：以上例句、词性分类均由互联网资源自动生成，未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。英语百科 Porphyran Porphyran is a sulfated carbohydrate dervied from red algae of the genus Porphyra. Porphyran is a complex sulfated carbohydrate. It is a highly substituted agarose with a linear backbone consisting of 3-linked beta-D-galactosyl units alternating with either 4-linked alpha-L-galactosyl 6-sulfate or 3,6-anhydro-alpha-L-galactosyl units. The composition includes 6-O-sulfated L-galactose, 6-O-methylated D-galactose, L-galactose, 3,6-anhydro-L-galactose, 6-O-methyl D-galactose and ester sulfate. Some of the ester is present as 1-4-linked L-galactose 6-sulfate. The precise composition of porphyran shows seasonal and environmental variations. In Porphyra haitanensis, the L-residues are mainly composed of alpha-L-galactosyl 6-sulfate units, and the 3,6-anhydro-galactosyl units are minor. In Porphyra capensis, the ratio of alpha-L-galactose-6-sulfate and the 3,6-anhydrogalactose is 1.2:1.
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Porphyran