Maria - please search for: room temp. , room temperature , reconstitute
Here is some info and links I've found on the web:
"Amino acids such as Cysteine, Methionine or Tryptophan are susceptible to oxidation and should be dissolved or stored in oxygen free water."
"Peptide Storage and Handling
All Princeton Peptides are supplied lyophilized under argon. For maximum stability the lyophilized peptide should be stored at -20 °C. Upon removal from the freezer, the peptide vial should be brought up to room temperature prior to opening and weighing to avoid moisture condensation.
Attempt to re-suspend the peptide in sterile distilled deionized water. If the peptide is insoluble, addition of a mild alkali such as 0.1% NH4OH can increase solubility of acidic peptides. On the contrary, mild acids such as 0.1% TFA can help solubilize basic peptides.
For peptides which contain methionine, cystenic or tryptophan residues, oxidation may generate impurities with or without concomitant biological inactivation. To avoid this, peptides containing these amino acids should be dissolved in oxygen-free solvents."
http://www.4adi.com/tech/pepstore.html http://dailymed.nlm.nih.gov/dailymed/fdaDrugXsl.cfm?id=1165&type=display Questions that arise (at least for me) are as follows:
Q1: Is bacteriostatic water the best dilutant for bremelanotide (PT-141) considering its toxcity (however slight for adults)?
Q2: Is bacteriosatic water deionized?
Q3: Does the benzyl alcohol in bacteriostatic water modify the chemistry (even slightly) of bremelanotide (PT-141)?
Q3: Is sterile water deionized?
Q4: Is deionized water sterile?
I will research these questions further. Those much more familar with peptides please feel free to voice your opinions.
As for me I think I will lean towards sterile water or deionized water as a dilutant for bremelanotide (PT-141).
Later,
Ted