When Margoshes and Vallee were studying the biological effect of metal in 1957, they separated a new protein from some animal organs. This protein contains abundant hydrosulfide groups and may chelate large amount of metallic ions; This substance is therefore named as Metallothionein (MT). In human body, animals, plants and micro organisms all there is MT contained and its rationalization characteristics are basically the same. The molecule of MT is oval; Its molecular weight is 6500 daltoms. The molecule is divided into two structure fields. There are 7-12 metallic ions contained in each molecule. It has special light absorption. The conformation of MT is solid and has a relatively strong thermo-stability. Since MT was found, it has become one of the hot spots of basic science research. From 1978 to 1999 four international special forums have been opened, in addition, China has also listed MT in the [863] Key Problems Scheme, in 1995 it was listed in the National Torch Program. Meanwhile the scientisde

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