TABLE 2.

Oligonucleotide primers used in this work

Designation	Sequencea
hybF265upBamHI	5′-CAAGGATCCCTCTGGCCGCTGCGCAAAGTG-3′
hybF186down	5′-GCTCATGGCAAATCCGACGTGTACCAGCAC-3′
hybFC-StrepII	5′-CACTTTTCAAACTGAGGGTGGCTCCATTCAACTCAATAC-3′
delhybF5′	5′-ATAGACGTCATACTACAACTCATGCATTTTCGCCACTC-3′
delhybF3′	5′-TATGACGTCTATTGTCCGCTCTGTCACGGC-3′

^aNewly generated restriction sites are printed in boldface.