Arginine side chains are always protonated; lysine and the amino terminus are protonated below about pH 9; glutamate and the carboxyl terminus are deprotonated above about pH 4. In the acidic conditions of reversed-phase purification the acidic groups are largely neutral and the peptide carries close to its full positive charge, so the counterion count is at its maximum in the solid.
This is why basic peptides carry more counterion mass than acidic ones.
Four trifluoroacetates add about 452 daltons to 2,174, or 17 per cent. Four acetates at 59 each add 236, or about 10 per cent. Residual water adds a few per cent more. A 40 mg vial of trifluoroacetate salt therefore contains roughly 32 to 34 mg of peptide; the certificate states the measured figure.
The counterion also affects solubility and, for cell work, can itself be biologically active at high concentration, which is why some suppliers exchange to acetate.
Counterion identity and content, water content, and net peptide content as a percentage of gross mass. The 40 mg on the pack is gross mass.
MOTS-c is supplied by REVIVE LAB UAE for laboratory research use only, with identity by mass spectrometry and purity by HPLC for the batch. It is not for human or veterinary use, and no dosing, administration or protocol guidance is provided.
| Format | Strength | Price | Availability |
|---|---|---|---|
| MOTS-c Pack | 40 mg | AED 950 | In stock |
Delivery is AED 40 flat and free on orders over AED 700. Payment is cash on delivery anywhere in the UAE, or USDT (TRC20) in advance, which takes 5% off the order total.
Arginine side chains are always protonated; lysine and the amino terminus are protonated below about pH 9; glutamate and the carboxyl terminus are deprotonated above about pH 4. In the acidic conditions of reversed-phase purification the acidic groups are largely neutral and the peptide carries close to its full positive charge, so the counterion count is at its maximum in the solid.
No. REVIVE LAB UAE supplies research materials and provides no dosing, administration or protocol guidance of any kind. Every product is sold for laboratory research use only and is not for human or veterinary consumption.
Stock is held in Dubai. An order confirmed before 4 PM Dubai time is dispatched the same working day, reaching Dubai and Abu Dhabi the same day and the remaining emirates within 24 hours. Delivery is AED 40 flat and free over AED 700.
Supplied for laboratory research use only. Not for human or veterinary consumption. REVIVE LAB UAE provides no dosing, administration or protocol guidance.