短語(yǔ)詞組短語(yǔ)deletion -mutant 缺失突變ler deletion mutant ler 基因缺失突變yelp deletion mutant strain 酵母elp4缺失突變株nagC deletion mutant nagC 缺失突變株nifZ deletion mutant 缺失nifZ的突變種gene deletion mutant 基因缺失突變yELP4 deletion mutant strain 酵母ELP4缺失突變株dual deletion mutant 雙重缺失突變子 返回 deletion mutant