streptomycin + GTP => 6-O-guanylylstreptomycin + diphosphate
streptomycin + gtp => 6-o-guanylylstreptomycin + diphosphate
streptomycin + GTP => 6-O-guanylylstreptomycin + diphosphate
streptomycin + gtp => 6-o-guanylylstreptomycin + diphosphate