Figure 9.

Transport Processes between Cytosol, Plastid, and Mitochondrion in the oastl Insertion Lines.

Transport of sulfide and Cys (dark arrows containing numbers) is indicated by the survival of the following mutant lines: 1, oastlB; 2, oastlC; 3, oastlAB. The white arrows show the predicted transport of OAS and Cys based on results obtained for oastlA, oastlC, and oastlAB and the low OAS-TL:SAT activity ratio in mitochondria of wild-type Arabidopsis. C, cytosol; P, plastid; M, mitochondrion.