If you were to take the mirror image of oxytocin, does it remain the same or does it change? Say I want a tattoo of it on the left side of my chest, going from the widest part of oxytocin to the smallest part, but it won't fit the way it is depicted below.
Would it still be correct or does something need to be changed? I can just get it on the opposite side but I'd like to know the chemistry of this.
Oxytocin is composed of $\alpha$-amino acids, which with the exception of one (glycine), are all chiral. A chiral molecule's mirror image is called its enatiomer, and has identical chemical properties except in the presence of other chiral molecules, i.e. in the body. This means enantiomer of oxytocin does not have the same biochemical activity as oxytocin, so you were wise to question whether or not this would be the same molecule. In addition to flipping the molecule, you need to change the wedges to dashes and dashes to wedges for it to still be the same molecule:
