本文研究了细菌的蛋白质多肽组分统计特征与基因组GC(Guanine+Cytosine)含量的相关性,发现当多肽长度较小时多肽组分特异性与GC含量存在着很强的关联;随着多肽长度增加,上述关联发生突变,关联迅速丧失.这一结果表明,基于组分特异性确定细菌亲缘关系的方法的确给出了不同于GC含量的信息,从而能实现有效分类. In this paper, we studied the correlation between the statistical characteristics of bacterial protein components and the content of GC (Guanine + Cytosine). We found that there is a strong correlation between the specificity of peptide components and GC content when the polypeptide length is small. With the increase of polypeptide length , The above association was abruptly changed and the association rapidly lost.This result showed that the method of determining the kinship of bacteria based on component specificity did give information different from the content of GC so that effective classification could be achieved.