Submitted on: 14 December 1998.
Revised on: 21 February 1999.
Accepted on: 19 April 1999.
___________________Biochemistry Research International
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Submitted on: 25 June 2005.
Revised on: 05 August 2005.
Accepted on: 18 September 2005.
___________________Biochemistry Research International
http://reply.papertrans.cn/1/35/3466/3466-34.png
Submitted on: 18 January 1999.
Revised on: 09 April 1999.
Accepted on: 25 May 1999.
___________________Biochemistry Research International
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