^pof;
Biochemistry;
and;
Molecular;
Biology,;
College;
of;
Basic;
Medical;
Science;
Harbin;
Medical;
University,;
Harbin;
150081,;
China;
^pKey;
Laboratory;
of;
Reproductive;
Biology;
Institute;
of;
Zoology;
Chinese;
Aeademy;
of;
Sciences,;
Beijing;
100101,;
China;