[4-Vinyl]Chlorophyllide alpha reductase (4VCR) catalyzes the conversion of 2,4-divinyl chlorophyllide alpha (DV Chlide alpha) to 2-vinyl,4-ethyl chlorophyllide alpha (MV Chlide alpha) via an NAPDH- dependent reaction. MV Childe alpha is the immediate precursor of monovinyl chlorophyll alpha in