{TAIL ~ The biomolecules} can be labeled with the dyes either directly or indirectly through {HEAD ~ a phosphoramidite} 
{ TAIL ~ The biomolecules } can be labeled with the dyes either directly or indirectly through { HEAD ~ a phosphoramidite }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD