Submitted on: 09 August 2017.
Revised on: 29 August 2017.
Accepted on: 16 October 2017.
___________________BMC BIOLOGY---BMC
Submitted on: 28 April 1998.
Revised on: 21 August 1998.
Accepted on: 22 September 1998.
___________________BMC BIOLOGY---BMC
http://reply.papertrans.cn/1/39/3868/3868-13.png
Submitted on: 26 January 2011.
Revised on: 08 April 2011.
Accepted on: 28 May 2011.
___________________BMC BIOLOGY---BMC
http://reply.papertrans.cn/1/39/3868/3868-15.png
http://reply.papertrans.cn/1/39/3868/3868-16.png
Submitted on: 17 March 2014.
Revised on: 18 May 2014.
Accepted on: 07 July 2014.
___________________BMC BIOLOGY---BMC
http://reply.papertrans.cn/1/39/3868/3868-18.png
http://reply.papertrans.cn/1/39/3868/3868-19.png
Submitted on: 23 December 1998.
Revised on: 06 February 1999.
Accepted on: 19 February 1999.
___________________BMC BIOLOGY---BMC