Table 1.

A comparison of K_n, K_s and K_a values in NgrolB and RirolB genes

	5′UTR*	ORF region†	144-bp portion‡	3′ UTR§
Kn	0.339  ±  0.021	0.197  ±  0.020	0.187  ±  0.042¶	0.362  ±  0.044
Ks		0.341  ±  0.058	0.267  ±  0.100
Ka		0.153  ±  0.019	0.128  ±  0.038
Ka/Ks		0.449	0.479

^*5′ untranslated region between rolB and rolC homologues (1,207 bp).  

^†ORF region of NgrolB and RirolB gene (633 bp).  

^‡ 3′ untranslated region of NgrolB gene that corresponds to 3′ coding sequence of RirolB gene (144 bp).  

^§ 3′ untranslated region from the site of RirolB termination codon to the site of the end of the left arm of the cellular T-DNA (318 bp; ref. 11)  

^¶ K_n is significantly higher in the 5′ and 3′ UTRs than in the 144-bp portion, but is not significantly different between the ORF and 144 regions (P < 0.01; t-test).