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