Prices of four amino acid products witness slight decline in Feb. 2011

In Feb. 2011, four major amino acid products in feed industry, namely lysine, tryptophan, threonine and methionine, suffered a slight price decline and gloomy transaction. On Feb. 15th 2011, the price of 98.5% lysine was USD2,190/t, down 0.34% over F...

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