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Release of β-galactosidase from E. coli ER1821 cells expressing cloned bacteriophage HP1 holin and endolysin. Activity of β-galactosidase was determined in supernatants of cultures. Uninduced cultures were supplemented with glucose, induced cultures with arabinose. C-control ER1821 cells with vector pMPMT4Ω, H-holin expressing cells, E-endolysin expressing cells, HE-holin and lysin expressing cells. Results are average of triplicate experiments.
