@dylanaviv hello and thank you for the suggestion.
A few things: any new images suggested need to be accompanied by appropriate citation for inclusion.
Additionally, we ask that any content-related suggestions include source citation as well, in order to streamline suggested edits.
Lastly, proline is one of many amino acids that can be in protonated, or deprotonated states, and this appears to be a validly protonated proline. If you feel differently, though, happy to discuss it further.
And, as before, if you have or find an image you think would be better-suited for the card please feel free to include it with proper citation and whatnot and we can take a look at it. 
For your perusal are the submission guidelines for Anking decks, for future reference: 📚 AnKing Step Deck Submission Guidelines
Let me know if you have any questions.