Doxycycline is an antibiotic  against gram-positive and gram-negative bacteria. More active biologically than the corresponding 6b-epimer hydrochloride. Derivative of oxytetracycline. A broad spectrum inhibitor used to inhibit matrix metallo-proteinases (MMP) such as type 1 collagenase in…

Vancomycin inhibits bacterial mucopeptide biosynthesis. Vancomycin is a glycopeptide antibiotic that blocks bacterial cell wall biosynthesis at the level of peptidoglycan biosynthesis. It inhibits incorporation of terminal D-alanyl-D-alanine moieties of the NAM/NAG-peptides. It is effective against…

Colistin is a polymyxin antibiotic, it is a mixture of cyclic polypeptides colistin A and B. Colistin is effective against most Gram-negative bacilli and is used as a polypeptide antibiotic. Colistin sulfate is used to permeabilize bacterial cell membranes and to study mannose-resistant…

A water-soluble bacteriolytic antibiotic in the carboxypenicillin group. It is effective against gram-negative bacteria. Inhibits bacterial cell-wall synthesis (peptidoglycan cross-linking) by inactivating transpeptidases on the inner surface of the bacterial cell membrane.

Piperacillin is a semisynthetic, broad-spectrum ureidopenicillin antibiotic. It is derived from ampicillin. Piperacillin inhibits the last stage of bacterial cell wall synthesis by binding to certain penicillin-binding proteins (PBPs), which results in cell lysis. Cell lysis is mediated by…