{HEAD ~ Such an assay} may be particularly useful in {TAIL ~ view} of evidence that transgenes have a tendency to become transcriptionally inactivated over the generations 
useful in
{ HEAD ~ Such an assay } may be particularly useful in { TAIL ~ view } of evidence that transgenes have a tendency to become transcriptionally inactivated over the generations
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH