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