At some intermediate PH called the isoelectric point, the protein molecule has no net charge. This can lead to attraction of protein molecules to each other resulting in loss of solubility, coagulation. and precipitation.中lead to是后面句子的谓语，attraction of protein molecules to each other是宾语，其中to each other做介词宾语起什么用途,什么成分？resulting in loss of solubility, coagulation. and precipitation.resulting in目前分词短语做结果状语。相互代词each other一般在句子中干什么成分？
attract为及物动词，使用方法之一为 attract A to B. 其中A为宾语，to B为状语。假如 something attracts A to B and attracts B to A. 就能说，Something attracts A and B to each other. 此时A and B 为宾语，to each other为状语。当attract变为名词attraction时，原来的宾语由介词of引出，of介词短语作定语,修饰名词attraction，表示动宾关系，to介词短语保留，此时因为修饰名词，改称为定语，表示动状关系，得到名词结构：attraction of A and B to each other. 在早期的英语中相互代词each other用于二者之间，one another用于三者或三者以上之间。现代英语中这种不同已经淡化，不再有严格区别，each other也被用于三者或以上之间。本句中protein molecules不止二个，互相吸引在一块更不是二个在一块，而是多个互相吸引，即不限于each other表示二者互相。
相互代词最容易见到的使用方法为作动词宾语，主语为复数（比如主语 Aand B)，主语A做的谓语动词以主语B为宾语，主语B做谓语动词以主语A为宾语，此时就用反身代词作宾语。比如：
Tom likes John，and John likes Tom. Tom and John like each other.
反身代词也常做介词宾语。
Tom and John often write to each other.
反身代词的所有格可以用作限定词。
Tom and John looked at each others face.
