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