Table 1.

Characteristics of acylated OVA^*

Compound	Number of modified amino groups	Number of free amino groups	Estimated molecular weight
OVA	0	21	46 000
Suc-OVA	18·3	2·7	47 800
Mal-OVA	19·1	1·9	47 900
Aco-OVA	14·8	6·2	48 300

^*The numbers and molecular weights were estimated using TNBS.