Table 1.

Mutant tRK1 and tRK2 transcripts and their import efficiencies

Transcript	tRNA	Original bases	New bases	Import efficiency, %
1	tRK1		No change	100
40	tRK1	C67, A68, G69	U67, G68, A69	<5
4	tRK1	C67, A68, G69, C72, U73	U67, G68, A69, A72, G73	50–75
29	tRK1	U73	G73	75–100
25	tRK1	m2G9	A9	20–30
26	tRK1	m2G9, G12, A15, C17, C23	A9, U12, G15, U17, A23	50–75
8	tRK1	C34	U34	50–75
6	tRK1	A28, U29, A31, Ψ39, A41, U42	U28, C29, G31, C39, G41, A42	75–100
7	tRK1	A28, U29, A31, C34, Ψ39, A41, U42	U28, C29, G31, U34, C39, G41, A42	<5
5	tRK1	G45, U48	U45, C48	75–100
30	tRK2	Ψ1, A72	G1, C72	5–10
2	tRK2	Ψ1, U34, A72	G1, C34, C72	150–200
93	tRK2	Ψ1, A72, G73	G1, C72, U73	75–100
33	tRK2	Ψ1, U34, A72, G73	G1, C34, U72, U73	<5

Import of transcript 1 was taken as 100%