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 <=> [thioredoxin]-dithiol + gdp