β-グルコシダーゼ(β-glucosidase; EC 3.2.1.21)は糖のβ-グリコシド結合を加水分解する反応を触媒する酵素。β‐D‐グルコシドグルコヒドロラーゼ，アミグダーゼとも呼ばれる[1]。また、β-グリコシド結合を持つ代表的な糖であるセロビオースやゲンチオビオースから、しばしばセロビアーゼ、ゲンチオビアーゼとも呼ばれる。
微生物，高等植物，動物の肝臓・腎臓・小腸粘膜，カタツムリ消化液などに広く分布するが、基質特異性は期限によって異なる[1]。
α-グルコシダーゼ同様、動植物通じて広く存在し、異化代謝に関わっている。アグリコンと糖の結合も分解するが、アグリコンの構造によっては、基質が阻害剤となる場合もある。セルロースの分解に関連する酵素で、β-グルコシダーゼの活性が低いとセロビオースが蓄積し、セルロースの働きを阻害する場合がある。ただし、一般的にはセルラーゼの活性の方が低い。
β-グルコシダーゼの先天性欠損症はゴーシェ病を引き起こす[1]。
2009年3月13日金曜日
Subway worker Richard Shannon sacked for filming himself stuffing lettuce up his nose
A SUBWAY sandwich bar worker was sacked after a video was posted on YouTube of him stuffing lettuce leaves up his nose, before putting them back in the serving tray.
Briton Richard Shannon, who also put salad leaves in his mouth and spat them out, was arrested after a "disgusted" customer recognised the 22-year-old on the internet.
The woman went to the global chain's outlet in Brownhills, West Midlands, and hurled a chair at him. Shannon admitted contaminating or interfering with goods with intent to cause economic loss, alarm or injury but claimed the incident, filmed by a friend on a mobile phone, was a prank and the lettuce had been discarded.
It is the latest incident in which fast-food chain employees have been caught out on film after teenage girls working at a KFC in the US were punished after taking a bath in the mammoth kitchen sink - and a male Hungry Jack's worker was sacked for the same offence.
Shannon was sentenced to 300 hours community service.
Briton Richard Shannon, who also put salad leaves in his mouth and spat them out, was arrested after a "disgusted" customer recognised the 22-year-old on the internet.
The woman went to the global chain's outlet in Brownhills, West Midlands, and hurled a chair at him. Shannon admitted contaminating or interfering with goods with intent to cause economic loss, alarm or injury but claimed the incident, filmed by a friend on a mobile phone, was a prank and the lettuce had been discarded.
It is the latest incident in which fast-food chain employees have been caught out on film after teenage girls working at a KFC in the US were punished after taking a bath in the mammoth kitchen sink - and a male Hungry Jack's worker was sacked for the same offence.
Shannon was sentenced to 300 hours community service.
登録:
投稿 (Atom)
