Table 2.

Melting temperatures for Fcε3–4 and IgE-Fc.

Urea concentration (M)	Tm (Fcε3–4) (°C)	Tm1 (IgE-Fc) (°C)	Tm2 (IgE-Fc) (°C)
0	52	55	64
1	48	50	63
2	47	45	57
3	39	39	53
4	–	–	49
5	–	–	46
6	–	–	42