TABLE 2.

Comparative Radiation Chemical Yields in nmol/J for Trapped Deoxyribose Radicals, Free Base Release and Direct SSBs

Γ	G(OH●)a	Gdir(fbr)b	G(dsb)c	Gdir(ssb)d	m(ssb)e	Gdir(ssb)/G(dsb)	GdRib(fr)f	G(diff)g
2.5 ± 0.2	0	134 ± 4	4.8 ± 0.9	124 ± 4	1.4 ± 0.2	26 ± 5	33 ± 5	91 ± 4
22.5 ± 1.1	23	>189 ± 21	3.5 ± 0.5	>182 ± 21	>2.8 ± 0.5	>52 ± 10	79 ± 12	>103 ± 21
		<212 ± 21		<205 ± 21	<3.1 ± 0.5	<59 ± 10		<126 ± 21

^aA yield of 70 nmol/J (5) was applied to the water target mass, which consists of the water lying beyond the hole transfer layer: Γ-10 = target mass = 12.5 waters/nucleotide for Γ = 10.

^bG_dir(fbr) ≥ G(fbr) − G(^●OH) and ≤G(fbr).

^cValues from ref. (12).

^dG_dir(ssb) = G(fbr) − 2 × G(dsb), assuming each SSB of the DSB gives a free base release.

^eSSB multiplicity = m(ssb) = G_dir(ssb)/G(sc-loss).

^fG_dRib(fr) values were reported in Table I of ref. (13).

^gShortfall = G(diff) = G_dir(ssb) − G_dRib(fr).