Biochem/physiol Actions Mode of Action: Inhibits prokaryote protein synthesis. Binds to S12 protein of 30S ribosomal subunit, preventing the transition from initiation complex to chain-elongating ribosome, causing miscoding or inhibiting initiation. Mode of Resistance: Mutation in rpsL (gene for S12 ribosomal protein) prevents binding of streptomycin to ribosome. Aminoglycoside phosphotransferase also inactivates.Antimicrobial spectrum: Gram-negative and Gram-positive bacteria. Other Notes 在蛋白质合成中抑制启动并导致 mRNA 的误读1;在 E. coli2 中克隆和表达抗生物素蛋白时移除 DNA