Been a steady researcher/customer of SA. However decided to compare their published sequence of SA-3R to canonical Reta and was surprised to see the fatty-acid side chain attached to the first of two lysines located next to each other. My understanding is that canonical reta—Lilly’s LY3437943—has it attached to the second lysine.

I contacted their customer service to ask if their product has the exact same structure as LY3437943 and whether the sequence shown is simply a formatting error. I also asked if their testing verifies the precise attachment location.

Alas, no answer whatsoever after a week and another follow up query. Maybe it's an error. Maybe it doesn't matter. Or maybe it's a Frankenstein and anybody's guess as to what a Rat might experience.

In any case, definitely erodes confidence and trust to not receive any answer or acknowledgement of the question. Disappointing.

Anyone else seeing this with SA or other vendors? Anyone with more than my HS level of Chemistry knowledge have an opinion?

@randy Any estimates of when the shop might be back in stock with the Gansulin pens?

@Randy
Appreciate it Randy and thanks @PeptideEd.

Curious if anyone knows why EZ Peptides COAs show images of bottles with handwritten, generic labels?

@randy thought I'd check in on this again. Thoughts?

@randy I hadn't noticed previously (shame on me) but the steam "key" on the glass cartridges I ordered from the Peptide Critic shop is blue vs. black. Am I misreading that this indicates that these haven't. been steam sterilized? Is it DYI? Appreciate the guidance.

Anyone have experience with Retinalamin?