Table 2.

Allocation of cluster designations

Host Phylum	Host Genus	Designations	Number
Actinobacteria	Mycobacterium	A – Z, AA – AJ	40
	Arthrobacter	AK – AZ, FA – FZ	42
	Streptomyces	BA – BT	20
	Propionibacterium	BU – BZ	6
	Rhodococcus	CA – CP	14
	Gordonia	CQ – DZ	36
	Microbacterium	EA – EM	13
	Corynebacterium	EN – EZ	13