Table I.

Test of Different Polyclonal Antisera Raised against rCPRF1, rCPRF2, and rCPRF4 for Cross-reactivity in an ELISA

Antiserum‡		Antigen*
		rCPRF1		rCPRF2		rCPRF4
Anti-CPRF1		100§		1		46
Anti-CPRF2		6		100		5
Anti-CPRF4		22		5		100

^* Highly purified, recombinant and refolded (His)₆-tagged CPRF1, CPRF2, and CPRF4 were used as antigens.  

^‡ Antisera were produced in mice as described in Kircher et al. (1998).  

^§ The ELISA signal obtained from the antiserum incubated with the corresponding antigen was set to 100. The relative signals of the preimmunosera were between 0 and 5 (data not shown).