{HEAD ~ A GC nucleotide repeat region encodes} alternating prolines and alanines from {TAIL ~ amino acids} 467 480 
{ HEAD ~ A GC nucleotide repeat region encodes } alternating prolines and alanines from { TAIL ~ amino acids } 467 480
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH