| PYE | peptone yeast extract |
|---|---|
| PYG | peptone-yeast extract-glucose [broth] |
| PYGM | peptone-yeast-glucose-maltose [broth] |
| TPG | transmembrane potential gradient; transplacental gradient; tryptophan peptone glucose [broth] |
| TPGYT | trypticase-peptone-glucose-yeast extract-trypsin [medium] |