ade53 fails to complement ade41 for adenine auxotrophy (in contrast to other ade5 alleles). It is not known whether ade53 is a double mutant or deficiency that affects two separate genes (ade4 and ade5) or whether ade4 and ade5 are actually a single gene and intragenic complementation is occurring between ade41 and other ade5 alleles.
Fails to complement: ade41.