寿司（上的细菌）赋予日本人的肠道细菌特殊的降解能力！

Japanese gut bacteria gain special powers from sushi
寿司（上的细菌）赋予日本人的肠道细菌特殊的降解能力！
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2 z: I8 A4 m" K+ E" m: H3 B% uSushi arms the guts of the Japanese with new digestive powers. A seaweed-eating enzyme seems to have jumped from marine bacteria to the harmless bugs that call the intestines of sushi-eaters home.

: q/ j3 F- i4 d& dThis is the first evidence that food bacteria can transfer genes to our own gut bacteria, and could help us extract more energy from food, says Mirjam Czjzek at the National Centre for Scientific Research (CNRS) in Roscoff, France.

! f4 R$ U: y: {# A  m& ^, \. M3 tCzjzek's group uncovered the genetic swap while hunting the genes for certain enzymes produced by bacteria. These enzymes break down carbohydrates in the cell walls of the algae that the bacteria feed on.
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One enzyme, porphyranase, breaks down a polysaccharide that makes up around 40 per cent of the cell walls of Porphyra, a red alga used to make the nori sheets that wrap around sushi. The carbohydrate is rare in most other marine plants, however.
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The enzyme turned up in samples of marine bacteria, but also, curiously, the gut of a Japanese person. "We thought this was a funny coincidence, especially as Porphyra is used in sushi," says Czjzek.

2 ]: [$ `+ F  b$ e6 jhttp://www.newscientist.com/arti ... ers-from-sushi.html

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寿司赋予日本人的肠道细菌特殊的消化功能！一种用来消化海藻的酶似乎已经从海洋里的细菌迁移到了以肠道为家的无害细菌里，并致力于消化寿司。
" Y- }- Z) o* @Mirjam Czjzek在法国罗斯科夫的国家科学研究中心（CNRS）时说，这是人类首次证明食物细菌可以把基因转导到我们的肠道菌群中，并且帮助我们从食物中获取能量。
, w7 \% ^! n7 M8 \% j# M% P# NCzjzek的团队还发现基因交换发生在寻找细菌的某种基因过程中，其表达的某种酶可以分解细菌食用的藻类细胞壁上的糖类物质。
; l, p1 u/ r! g- t1 Y( e有一种酶叫做紫菜酶，它可以分解紫菜细胞壁上构成比约40%的多糖物质，而寿司正是由一种红色紫菜包绕而成。然而，在大多数的海生植物中，这种多糖并不多见。
原本在水生细菌的样本中发现的酶如今又在日本人的肠道中亮相，不能不让人惊讶，“我们本以为这只是一个巧合，但当意识到寿司中使用了紫菜，这一想法才有了改观” Czjzek如是说。
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以后点菜先点紫菜蛋花汤

这个有这么神奇吗？
我还听说：日本的研究表明，每天吃一个鸡蛋和偶尔吃鸡蛋或不吃鸡蛋的人，他们的寿命还更短！