In certain embodiments, {HEAD ~ P X} is an introduced heterologous molecule, meaning that the cell or its ancestors was genetically altered with {TAIL ~ a vector} comprising P X 
In certain embodiments , { HEAD ~ P X } is an introduced heterologous molecule , meaning that the cell or its ancestors was genetically altered with { TAIL ~ a vector } comprising P X
OTH 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 TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH