All the patients (11) displayed IgE binding to the 14 kDa protein (profilin) from the extract (Willerroider et al. 2003) 
Out of 49 sera from German patients with tomato-related symptoms 18 (37%) recognized several bands above 20 kDa. From the Spanish group, 10 out of 29 (34.5%) sera showed reactivity in the high molecular mass range. The authors also detected binding to proteins with a molecular mass of 15 and 9 kDa (Westphal et al. 2003) 
Group A of patients reacted to a double protein band at 44 and 46 kDa, a triple band at 67 kDa, several proteins at 20 and 30 kDa; and a protein between 14 and 20 kDa. In pool B, the profile obtained was similar to pool A, except that it had two more bands at 14 and 17 kDa (Reche et al. 2001) 
The IgE binding to some protein bands from both Japanese cedar pollen and tomato fruit extracts are mutually inhibited, but the protein bands involved in this cross-reactivity differed between patients (Kondo et al. 2002) 
One patient reacted specifically to a 43-kDa protein band on IgE immunoblot (Zacharisen et al. 2002) 
Foetisch et al. (2001)  revealed beta -fructofuranosidase, polygalacturonase 2A, and pectinesterase as further tomato allergens.