ADP + AMP $$\buildrel {Light\,energy} \over
\longrightarrow $$ ATP
ADP + Inorganic PQ4 $$\buildrel {Light\,energy} \over
\longrightarrow $$ ATP
ADP + Inorganic PQ4 $$\buildrel \, \over
\longrightarrow $$ ATP
AMP + Inorganic PQ4 $$\buildrel {Light\,energy} \over
\longrightarrow $$ ATP