The sequence of the first five N-terminal amino acids was determined and was found to be Ala-Gln-His-Pro-Pro.
Placental Lactogen Ovine is biologically active as evidenced by inducing proliferation of Nb2 cells.
The protein was lyophilized from a concentrated (1mg/ml) solution with 0.02-0.03% NaHCO3.
Sterile Filtered White lyophilized (freeze-dried) powder.
UV spectroscopy at 280 nm using the absorbency value of 0.85 as the extinction coefficient for a 0.1% (1mg/ml) solution. This value is calculated by the PC GENE computer analysis program of protein sequences (IntelliGenetics).
Greater than 98.0% as determined by:
(a) Analysis by SEC-HPLC.
(b) Analysis by SDS-PAGE.
It is recommended to reconstitute the lyophilized Placental Lactogen in sterile 18MΩ-cm H2O not less than 100ug/ml, which can then be further diluted to other aqueous solutions.
Lyophilized Placental Lactogen Ovine Recombinant although stable at room temperature for 3 weeks, should be stored desiccated below -18oC. Upon reconstitution Placental Lactogen should be stored at 4oC between 2-7 days and for future use below -18oC.
For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA).
Please prevent freeze-thaw cycles.
Chorionic Somatomammotropin Hormone 1, CSH1, CS-1, hCS, PL.
