Table 1. Primers used for cloning of the H. americanus H2 subunit.
| CRTA1 | Forward, 5′-AAATGTGCCTCCGTAGCAAACCAGGCCAAC-3′ |
| CRTA2 | Forward, 5′-TTTGTAACTGCAGGAAAATGTGCCTCCGTAGCAAAC-3′ |
| CRTA3 | Forward, 5′-GATGGAATTCCTTCATTTGTAACTGCAGGAAAATGTG-3′ |
| CRTA | Reverse, 5′-TTAAGCTCTGTAGACACACTC-3′ |