Probable thiol-disulfide oxidoreductase that may play a role in proper chloroplast development. Belongs to the thioredoxin family. Plant CITRX-type subfamily. The article has been retracted, because it has become clear that the thioredoxin that interacts in yeast 2-hybrid with the Cf-9 C-terminus is in fact localized in the chloroplast, rendering a role in Cf-9 signaling unlikely. All the authors agree that this paper should be withdrawn from the scientific literature.