T of the branching enzyme (GlgB). This enzyme, which produces branched glycogen from glycogen, has a very high Trp content (p/P Trp ratio 3.42). During Trp starvation, glycogen accumulation would seem to be minimal at the outset in consideration of the drastically diminished import of the beginning substrate (glucose-6-P), as discussed in the preceding section. The additional impact of the high Tr