[thioredoxin]-dithiol + GDP => dGDP + [thioredoxin]-disulfide + H2O
[thioredoxin]-dithiol + gdp => dgdp + [thioredoxin]-disulfide + h2o
[thioredoxin]-dithiol + GDP => dGDP + [thioredoxin]-disulfide + H2O
[thioredoxin]-dithiol + gdp => dgdp + [thioredoxin]-disulfide + h2o