The sequence of the first five N-terminal amino acids was determined and was found to be Met-Leu-Pro-Ile-Cys.
The ED50 as determined by the dose-dependent stimulation of the proliferation of rat lymphoma, Nb2-11 was found to be < 0.065 ng/ml corresponding to a specific activity of 15.4MUnits/mg.
The protein was lyophilized from a concentrated (1mg/ml) solution with 10mM sodium Phosphate buffer pH=8 and 50mM Nacl.
Sterile Filtered White lyophilized (freeze-dried) powder.
Greater than 95.0% as determined by:
(a) Analysis by SEC-HPLC.
(b) Analysis by SDS-PAGE.
It is recommended to reconstitute the lyophilized Prolactin in sterile 18MΩ-cm H2O not less than 100ug/ml, which can then be further diluted to other aqueous solutions.
Lyophilized Prolactin although stable at room temperature for 3 weeks, should be stored desiccated below -18oC. Upon reconstitution Prolactin 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.
Mammotropin, Luterotropic hormone, Lutetropin, PRL.
