TABLE 1.

Primers used in this study

Primer	Sequence
fosA3/4-forward	5′-TGA ATC ATC TGA CGC TGG-3′
fosA3/4-reverse	5′-TCA ATC AAA AAA GAC CAT C-3′
fosC2-forward	5′-CGT TCC GTG GAG TTC TAT AC-3′
fosC2-reverse	5′-CTT GAT AGG GTT TAG ACT TC-3′
fosA3/4En-forward	5′-CGA TCA CAG TTT ACA ACA GG-3′
fosA3/4En-reverse	5′-GGC TAT CTT GCT CAG CTC TA-3′