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Confirmation of the role of CghA in the selective formation of 1 by complementing the cghA-disruption mutant with cghA in C. globosum. HPLC traces of extracts of the culture of (i) wild-type control CGKW14, (ii) ΔcazM/CGKW14 as a control showing the loss of production of 8 and 9, (iii) ΔcghA/ ΔcazM/CGKW14 and (iv) ΔcghA/cazM∷cghA/CGKW14. Authentic reference of (v) 1 and (vi) 7.
