MKLAYWMYAGPAHIGTLRIASSFKNVHGIMHAPLGDDYFNVMRSMLERERDFTPVTASIVDRHVLARGSQEKVVDNIIRKDTEEHPDLIVLTPTCTSSILQEDLQNFVRRASLSTTADVLLADVNHYRVNELQAADRTLEQIVQFYIDKARRQGTLGTSKTPTPSVNIIGITTLGFHNQHDCRELKQLMADLGIQVNLVIPAAATVHDLQRLPQAWFNLVPYREIGGLTAQYLEREFGQPSVRITPMGVVETARCIRAIQGVLNAQGAGVNYEAFIEQQTREVSQAAWFSRSIDCQNLTGKKAVVFGDNTHAAAMTKILSREMGIHVVWAGTYCKYDADWFRAEVAGFCDEVLITDDHTVVGDAIARVEPAAIFGTQMERHVGKRLNIPCGVIAAPIHIQDFPVGYRPFLGYEGTNQLVDLIYNSFTLGMEDHLLEIFGGHDTKAVIHKGLSADSDLTWTAAGLAELNKIPGFVRGKVKRNTEKFAREQGISEITVEVLYAAKEAVGA Uses Mg-ATP and reduced ferredoxin to reduce ring D of protochlorophyllide (Pchlide) to form chlorophyllide a (Chlide) (By similarity). This reaction is light-independent. CHLB_THEEB 508 tll2392 Light-independent protochlorophyllide reductase subunit B chlB