Proteins are comprised of {TAIL ~ amino acids}, which are ambivalent their charge changes based on the pH of {HEAD ~ the environment} to which they are exposed 
Proteins are comprised of { TAIL ~ amino acids } , which are ambivalent their charge changes based on the pH of { HEAD ~ the environment } to which they are exposed
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH