As already described in Deleu et al. (2016b), most egg yolk
protein forms an SS bond based network during baking. Fig. 4 reveals
that about 30% of the yolk protein is incorporated in the
network before reaching 84 C. Up to this point, most egg white
protein which does not contain free SH groups is incorporated in
the network by SH/SS exchange reactions (Deleu et al., 2016a). Our
results suggest that some yolk protein crosslinks in the same
temperature region, and, as many of them have free SH groups
(Table 1), they may well react with egg white protein to form a
mixed network. Since granules disintegrate during batter formation,
both plasma and granule protein may play a role here.