问题描述：
求下面一句英文的结构分析.
“ Most of these genes were identified through their homology with known RNA interference components in animals,a candidate-gene approach,mutants with developmental phenotypes resembling those of mutants deficient in miRNA biogenesis or with elevated levels of miRNA target genes,and forward genetic screening using a GFP sensor targeted by endogenous miRNA .”
“ Most of these genes were identified through their homology with known RNA interference components in animals,a candidate-gene approach,mutants with developmental phenotypes resembling those of mutants deficient in miRNA biogenesis or with elevated levels of miRNA target genes,and forward genetic screening using a GFP sensor targeted by endogenous miRNA .”
问题解答：
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