obsolete luteolin C-glucosyltransferase activity (obsolete GO:0102948)
OBSOLETE. Catalysis of the reaction: 2-(3,4-dihydroxyphenyl)-5-hydroxy-4-oxo-4H-chromen-7-olate luteolin-7-olate + a glucosylated glucose acceptor = isoorientin + a non glucosylated glucose acceptor.