erg6 , the putative structural gene for s-adenosylmethionine : delta 24-methyltransferase , which catalyzes c-24 methylation , was cloned , and haploid strains containing erg6 null alleles ( erg6 delta 1 and erg6 delta : :leu2 ) were generated .
C0025831
methyltransferase
C0025723
methylation