TABLE 1.

Primers used in this study

Primer name	Sequence (5′ to 3′)a
Domain 1 for	CGCGGATCCAGAAGTTAAACAGGAG
Domain 1 rev	AAAACTGCAGTCAATGATGATGATGATGATGAGCTGCCACAAG
Domain 2 for	CGGGATCCAGCAGCTTATCCGATTGTACATGTAGAT
Domain 2 rev	CCCAAGCTTTCAATGATGATGATGATGATGTGTTTCTTGAATTTG
Domain 3 for	GGATCCACTGCACGTATCATTTTTAATGGTAA
Domain 3 rev	CCCAAGCTTTCAATGATGATGATGATGATGACGTTTATCGCGAATCAGAATATT
Domain 4 for	CGCGGATCCATTTCATTATGATAGAAATAACATAGCAGTTGGG
Domain 4 rev	CCCAAGCTTTCAATGATGATGATGATGATGTCCTATCTCATAGCC

^aRestriction sites are underlined.