Significance of Heavy-Ion Beam Irradiation-Induced Avermectin B1a Production by Engineered Streptomyces avermitilis

Table 1

Comparison of strain-specific productivity after ¹²C⁶⁺ heavy-ion irradiation with energy input of 140 AMeV at a dose of 80 Gy .

Group	Number of colonies	Strain			(%)
		The original strain AV-J-AO			40.3
AO-M31	8	AO-M31-1			47.1
		AO-M31-2			51.4
AO-M32	13	AO-M32-1			40.9
		AO-M32-2			42.5
P	21
AO-M33	17	AO-M33-1			58.9
		AO-M33-2			26.7
AO-M34	16	AO-M34-1			53.7
		AO-M34-2			51.4
AO-M35	27	AO-M35-1			49.8
		AO-M35-2			53.3
AO-M36	8	AO-M36-1			48.9
		AO-M36-2			45.7
AO-M37	9	AO-M37-1			31.5
		AO-M37-2			—
M	77
AO-M38	328	AO-M38-1			63.2
		AO-M38-2			38.3
T	426
18.1%			4.9%

and represent the percentage content of specific productivity of all mutant’s and to those of the original strain S. avermitilis, respectively. (%) indicates the ratio of to .