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Quantitative (fluorimetric) GUS activity assays. (A) Quantification of GUS activity in BT-1/pLF057 (hol::uidA) cells treated with the aqueous crude extracts prepared from the indicated “Ca. Liberibacter asiaticus” hosts. (B) Quantification of GUS activity in BT-1/pLF058 (lacZ::uidA) cells following treatment with the “Ca. Liberibacter asiaticus” host extracts as described for panel A.
