WHILE-LOOP 将一个条件与使用关键字 LOOP 和 END LOOP 包围的一个语句序列关联在一起，如清单 7 所示。

The WHILE-LOOP associates a condition with a sequence of statements enclosed by the keywords LOOP and END LOOP, as shown in Listing 7.

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多克隆抗体是通过一种合成的肽段去免疫动物产生。这种合成的肽段与包围于人源APC蛋白序列一致，抗体由蛋白a和肽段亲和层析技术纯化。

Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to the sequence of human APC. Antibodies are purified by protein a and peptide affinity chromatography.

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