////// it is pepsinogen //////
Chlorine is the most electronegative
<span><span>Argon,</span><span>Carbon dioxide,</span><span>Neon,</span><span>Helium, and </span><span>Methane</span></span>
C. pain reliever
ex. tylenol, aleve, etc.
Proteins make up many many important structures in our cells ( ex : receptors , Enzymes , integral proteins and so on )
