CH1 (CHLOROPHYLL B BIOSYNTHESIS); chlorophyllide a oxygenase. Identical to Chlorophyllide a oxygenase, chloroplast precursor (CAO) [Arabidopsis Thaliana] (GB:Q9MBA1;GB:Q3ECX2;GB:Q3ECX3;GB:Q9SPF2;GB:Q9XJ37); similar to TIC55 (TRANSLOCON AT THE INNER ENVELOPE MEMBRANE OF CHLOROPLASTS 55), oxidoreductase [Arabidopsis thaliana] (TAIR:AT2G24820.1); similar to hypothetical protein OsI_033526 [Oryza sativa (indica cultivar-group)] (GB:EAY79567.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO61873.1); similar to chlorophyll a oxygenase, putative, expressed [Oryza sativa (japonica cultivar-group)] (GB:ABB48003.2); contains InterPro dom