penicillin v antibiotic, molecular model.

penicillin antibiotic molecular model peptidoglycan chemistry fleming atom phenoxymethylpenicillin pen chemical infection penam molecule scientific computer streptococcus science biochemistry antibacterial atomic compound betalactam staphylococcus betalactamase structure pcn bacteria bacterium or used treat bacterial infections three representations 2d skeletal formula 3d ballstick spacefilling atoms are represented as spheres conventional color coding hydrogen white carbon grey oxygen red nitrogen blue sulfur yellow