发信人: puppeteer (不想减肥的河马), 信区: Biology
标 题: Re: question on raw bean.
发信站: Unknown Space - 未名空间 (Wed Jul 14 13:23:28 2004) WWW-POST

http://vm.cfsan.fda.gov/~mow/chap43.html

It's a protein called lectin

A Lectin is any protein which specifically interacts with sugar molecules
(carbohydrates) and are found in a variety of species from insects to man.
They serve many different biological functions from the regulation of cell
adhesion to glycoprotein synthesis and the control of protein levels in the
blood. Lectins are also known to play important roles in the immune system by
recognising carbohydrates found exclusively on pathogens.

Kidney beans are a variety of common bean The Common bean or haricot is
Phaseolus vulgaris of the family Fabaceae. Most of the common bean varieties
belong in this species, and there are also may terms which apply to all or
part of the species depending upon variety and treatment. These beans,
although commonly known as "vegetables", are actually fruits, because they
develop from a plant ovary and house seeds.
Varieties grown for the dry bean include pinto beans, navy beans or pea beans,
kidney beans and black turtle beans. The many varieties grown for the pods are
referred to as green beans, string beans or snap beans and include the wax
beans. Both bush and running (pole) varieties exist. The colors and shape of
pods and seeds vary tremendously.

They must be boiled for at least ten minutes before they are edible. The
boiling degrades a toxic compound - a lectin.

A Lectin is any protein which specifically interacts with sugar molecules
(carbohydrates) and are found in a variety of species from insects to man.
They serve many different biological functions from the regulation of cell
adhesion to glycoprotein synthesis and the control of protein levels in the
blood. Lectins are also known to play important roles in the immune system by
recognising carbohydrates found exclusively on pathogens.

lectin is found in the bean which would otherwise cause severe gastric upset


--
大肚能容，容天下难容之事；
开口便笑，笑世间可笑之人。
※ 修改:·puppeteer 於 Jul 14 13:23:28 修改本文·[FROM: 143.48.]
※ 来源:．Unknown Space - 未名空间 mitbbs.com．[FROM: 143.48.]