. 2003 May 1;31(9):2434–2442. doi: 10.1093/nar/gkg336

Table 1. Luciferase activity of PSIV IRES variants with mutations in the internal bulge of Domain 3.

	Sequence^a	Relative light units^b	Relative luciferase activity
Wild-type	CUCAA_6153–6157	48 445 ± 9843	100%
	GUGU_6175–6172
C₆₁₇₃	CUCAA_6153–6157	19 275 ± 1465	39.8%
	GUCU_6175–6172
C₆₁₇₃ + G₆₁₅₅	CUGAA_6153–6157	51 923 ± 3964	107.2%
	GUCU_6175–6172

^aUnderlining indicates mutated nucleotides.

^bStandard deviations are also indicated.