. "The chemical reactions and pathways involving purine deoxyribonucleoside triphosphate, a compound consisting of a purine base linked to a deoxyribose sugar esterified with triphosphate on the sugar." . . . "purine deoxyribonucleoside triphosphate metabolic process" . "purine deoxyribonucleoside triphosphate metabolism" . . . . . . .