在比较功能已知或未知蛋白质的结构同源性时，常常是根据氨基酸残基的疏水性或亲水性。
When the structural homology of proteins with known or unknown functions are compared, it is an usual way to base such comparisons on the hydrophobicity or hydrophilicity of the amino acid residues.
35条序列与拟南芥基因功能尚未确定的假定蛋白或未知蛋白同源性很高，占14.64%；
EST sequences of 14.64%matched to the genes of Arabidopsis tha liana, whose protein function were unclassified;
他们相信，疾病发生的初期，虽仍有未知的基因及其他原因在作祟，但脑部已经有大量的类乙型蛋白产生。
The disease begins, they believe, when for still unknown genetic and other reasons, the brain starts to churn out amyloid.
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