TABLE 1.

Oligonucleotide primers used for construction of LTR mutants

Oligonucleotide primer	Oligonucleotide primer sequence
V-8614	5′-AGAAACGGGGATGGTACAAAT
V-8917-AP1	5′-GTGTCATCCTTCTGGTAACAGTGAC
V-8917-2AP1	5′-TACATTTGCTTCTGGTAACAGTGAC
V-9012-CAAAT	5′-CTTGCGGTTACCTGTGTCATCC
V-9018-AML	5′-GCAGAACTACATTTGCTGTGTC
V-9156	5′-GAGCTTTCAGGCAGGCAGGAG