2-Nitrophenyl-beta-D-galactopyranoside, ONPG
2,3,5-Triphenyltetrazolium chloride (TTC; Tetrazolium chloride)
Isopropyl-beta-D-thiogalactopyranoside (IPTG)
X-Gal, 5-Bromo-4-Chloro-3-indolyl β-D-galactopyranoside
