Critical 5′ and 3′ control elements from Cnidaria can be identified by cloning {TAIL ~ PCR amplified portions} of 5′ and 3′ {HEAD ~ flanking sequences} of known metazoan genes into reporter expression vectors, and measuring their effect on reporter expression following transformation of the metazoan hosts  
Critical 5′ and 3′ control elements from Cnidaria can be identified by cloning { TAIL ~ PCR amplified portions } of 5′ and 3′ { HEAD ~ flanking sequences } of known metazoan genes into reporter expression vectors , and measuring their effect on reporter expression following transformation of the metazoan hosts
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