Tetracycline is a polyketide antibiotic produced by Streptomyces spp. It inhibits protein synthesis by binding to 30S ribosomal subunit and blocking attachment of charged aminoacyl tRNA to ribosome. This prevents incorporation of new amino acids to the nascent peptide chain. It acts as a broad spectrum antibiotic against Gram-positive and Gram-negative bacteria. In cell culture media, Tetracycline finds application as an anti-bacterial agent to prevent contamination. It is also used as a selection agent for cells containing tetracycline resistance gene. Besides this, Tetracycline-based externally regulated (Tet-based) systems have been successfully used to control the expression of numerous transgenes in cultured cells. These systems work on principle of reversible switch-on-switch-off of the experimental gene in presence of Tetracycline. These are tightly regulated and highly responsive systems that produce on-demand robust expression of gene of interest in target cells. During such Tet-system based mammalian cell culture studies, an animal-free media is to be used for cell growth and to prevent any interference with excess tetracycline present in media.
Appearance
Light yellow to orange crystals or powder or solid.
Solubility
33.3 mg soluble in 1 ml of water on heating.
pH
1.80 - 2.80
FTIR
Matches with standard pattern
Specific rotation
-255° to -240° (c=0.50% in 0.1M HCl at 20°C)
Antibiotic sensitivity
Complies
Potency
NLT 900 µg/mg
Assay (NT/HPLC/NaOH Titration)
90.00 - 102.00%
Cell Culture Test
Passes
Preparation instructions
For cell culture applications, Tetracycline hydrochloride solution can be prepared as per required concentrations in water.
Sterilization instructions
Solutions can be sterilized by filtering through a sterile membrane filter with a porosity of 0.22 microns or less.
Storage conditions
Store powder at 2 - 8°C in air tight containers and away from bright light.
Stock solution storage
Stock solutions should be stored at -20°C.
Shelf life
36 months.
Use before expiry
Use before expiry date given on the product label.