Higher amounts of gluten content are desirable for steamed
bread making (Day, Augustin, Batey, & Wrigley, 2006). In case of
entire grain grinding processes, the gluten contents for the SM and
HM processes using Zhengmai 366, the HM and UM processes
using Yumai 57 and the HM process using CWRS were significantly
higher than that of wheat flour. Whole wheat flour from entire
grain grinding processes had higher gluten content than that from
bran recombining processes. The gluten contents for all bran
recombining processes were lower than that of wheat flour, with
EBR getting the lowest level. This is probably due to three factors:
bran is mainly consisted of albumin and globulin which had poor
quality than gluten; bran can weaken gluten network; denaturation
of protein caused by bran pretreatment decreased quality of gluten.
Gluten indexes of whole wheat flours were higher than that of
wheat flour except for UMBR using CWRS. However, there is no a
trend in gluten index among different milling processes.