R "is a replaceable function, e. G. Acetoxy, methoxy, their acyloxy and alkoxy homologs or halo."
是取化基，如乙氧基、甲氧基及它们的环氧和烷氧同系物或卤基。
2
MIR is not homologous to any known protein, as homologs were not found in the rice or Arabidopsis genome databases, or in the EST database for other organisms.
通过对拟南芥和水稻基因组的以及其他物种EST数据库的比对，发现MIR和已知蛋白均不同源。
3
A new chemical equation for the reaction of ethane with steam is suggested. It is pointed out that the steam conversion is similar to hydrocracking of methane homologs.