. 2003 Jun 15;31(12):3134–3142. doi: 10.1093/nar/gkg408

Table 1. Parameters of the HPLC–MS/MS detection of Thd dimeric photoproducts in the positive (ESP⁺) and negative (ESP^–) electrospray ionization modes.

	Product
	<>c,s	<>t,s	<>c,a	<>t,a	(6–4)	Spore
Retention time (min)	16.8	17.1/17.6	18.9/19.2	23.4	23.0/25.4	25.6/27.6
ESP⁺	253	253	127	127	235	253
ESP^–	350	350	125	241	n.d.^a	279

Parent ions were set at m/z = 485 and 483, respectively. Detection in the multiple reaction monitoring mode involved the daughter ions listed. Retention times are provided for the single or the (+) and (–) diastereoisomers of each photoproduct. <>c,a, <>c,s, <>t,s and <>t,a, cis,anti, cis,syn, trans,syn and trans,anti cyclobutane dimers; (6–4), (6–4) photoproduct; spore, spore photoproduct.

^aThymidine (6–4) photoproducts are ionized in very low yield in the negative mode and cannot be quantified under these conditions.

Table 1. Parameters of the HPLC–MS/MS detection of Thd dimeric photoproducts in the positive (ESP+) and negative (ESP–) electrospray ionization modes.

Table 1. Parameters of the HPLC–MS/MS detection of Thd dimeric photoproducts in the positive (ESP⁺) and negative (ESP^–) electrospray ionization modes.