Any process that stops, prevents or reduces the frequency, rate or extent of glycogen synthase activity, transferring glucose-1-phosphate.
Synonyms:
exact_synonym:
down regulation of glycogen synthase activity, transferring glucose-1-phosphate; downregulation of glycogen synthase activity, transferring glucose-1-phosphate
narrow_synonym:
inhibition of glycogen synthase activity, transferring glucose-1-phosphate