. "The chemical reactions and pathways resulting in the formation of guanine tetraphosphate (5'-ppGpp-3'), a derivative of guanine riboside with four phosphates." . . . . . . "guanosine tetraphosphate biosynthetic process" . "guanosine tetraphosphate (5'-ppGpp-3') biosynthesis" . "guanosine tetraphosphate (5'-ppGpp-3') biosynthetic process" . "guanosine tetraphosphate anabolism" . "guanosine tetraphosphate biosynthesis" . "guanosine tetraphosphate formation" . "guanosine tetraphosphate synthesis" . .