TABLE 2.

Antibody responses^a

Monkey	Antigen	ELISA titer on post- immunization day:
		15	210
M21	LSA1-J	<100b	<100
	LSA1-NR	2,700	8,100
	LSA1-REP	100	300
	LSA1-TER	2,700	8,100
M23	LSA3-NRI	<100	<100
	LSA3-NRII	100	100
	LSA3-RE	100	100
	LSA3-CT1	100	100
M4	SALSA-1	100	100
	SALSA-2	2,700	8,100
M48	STARP-R	2,700	2,700
	STARP-M	24,300	8,100

^aTiters determined in samples taken 15 and 210 days postimmunization correspond to the dilution of the test sera whose optical density at 450 nm was above the mean of control Aotus sera plus 2 standard deviations. Controls included (i) sera from 10 Aotus monkeys with no history of exposure to malaria, as well as preimmunization sera from the immunized monkeys, and (ii) peptides RESA and MSP3. The mean optical densities of the control Aotus sera against each of the peptides, used to define the cutoff values, ranged between 0.02 and 0.18. 

^bNegative at a dilution of 1:100.