The younger bacteroid was elliptic and had a similar nucleus region in cell. The normal bacteroid had an intact membraneenvelope and PHB granules.
幼年美菌体为椭圆形，里面有个拟核区，正常类菌体有完整的周膜和PHB颗粒。
2
The research results of SARS-Cov and MHV showed that it is possible that Coronavirus and other envelope virus have the similar membrane fusion mechanism.
A donor cell is fused to the egg by pulses of electricity, which break down the donor cell's outer membrane and allow the egg to envelope its new nucleus.