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

Table 3

Comparison of strain-specific productivity after ¹²C⁶⁺ heavy-ion irradiation with energy input of 220 AMeV at a dose of 80 Gy .

Group	Number of colonies	Strain			(%)
		The original strain AV-J-AO			40.3
147-G51	18	147-G51-1			61.5
		147-G51-2			42.9
147-G52	23	147-G52-1			62.4
		147-G52-2			63.7
P	41
147-G53	13	147-G53-1			57.3
		147-G53-2			48.8
147-G54	18	147-G54-1			50.1
		147-G54-2			49.3
147-G55	21	147-G55-1			—
		147-G55-2			37.3
147-G56	11	147-G56-1			32.7
		147-G56-2			48.9
147-G57	13	147-G57-1			43.4
		147-G57-2			—
M	76
147-G58	217	147-G58-1			69.2
		147-G58-2			61.4
T	334
22.8%			12.3%

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 .