human
What are the different types of tetracyclines?
assistant
1.  Tetracycline is a broad-spectrum antibiotic that works by binding to bacterial ribosomes and inhibiting protein synthesis.
2.  Doxycycline is a semi-synthetic tetracycline derivative with increased stability against degradation in the body.
3.  Minocycline is a second-generation tetracycline that has improved tissue penetration and lower toxicity than other tetracyclines.