To put this all into perspective, most life could not occur without this protein. All of the reactions that occur in the membranes of chloroplasts could not occur. And as the light reactions of photosynthesis could not occur, ATP could not be made to power the Calvin-Benson Cycle. This means that CO2 could not be fixed by RuBisCO and sugars could not be made. This means that animals (including humans) would not have food. So next time you take a breath, eat some delicious food or even walk by a tree, remember to be thankful for light-independent protochlorophyllide reductase.
Picture provided by http://www.co.marshall.ia.us/zenphoto/conservation/forest+floor.JPG.php