. "The chemical reactions and pathways resulting in the formation of peptidyl-diphthine from other compounds, including peptidyl-histidine." . . . "peptidyl-diphthine biosynthetic process from peptidyl-histidine" . "peptidyl-diphthine anabolism from peptidyl-histidine" . "peptidyl-diphthine formation from peptidyl-histidine" . "peptidyl-diphthine synthesis from peptidyl-histidine" . .