[thioredoxin]-dithiol + NADP(+) <=> [thioredoxin]-disulfide + NADPH + H(+)
[thioredoxin]-dithiol + nadp(+) <=> [thioredoxin]-disulfide + nadph + h(+)
[thioredoxin]-dithiol + NADP(+) <=> [thioredoxin]-disulfide + NADPH + H(+)
[thioredoxin]-dithiol + nadp(+) <=> [thioredoxin]-disulfide + nadph + h(+)