1-hexadecanoyl-2-(5-oxopentanoyl)-sn-glycero-3-phosphate + NADPH + H(+) => 1-hexadecanoyl-2-(5-hydroxypentanoyl)-sn-glycero-3-phosphate + NADP(+)
1-hexadecanoyl-2-(5-oxopentanoyl)-sn-glycero-3-phosphate + nadph + h(+) => 1-hexadecanoyl-2-(5-hydroxypentanoyl)-sn-glycero-3-phosphate + nadp(+)