Assertion: firefly's bioluminescence | /r/HasProperty | observed with synthetic lh
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Source sentences:
text: The cross-linked luciferase could not produce light with LH 2 plus Mg-ATP because it could not make the adenylate; however, bright bioluminescence was observed with synthetic LH 2 -AMP because it remained capable of catalyzing the oxidative production of excited state oxyluciferin.