Editing Homeobox (section)

== Plant homeobox genes ==
As in animals, the plant homeobox genes code for the typical 60 amino acid long DNA-binding homeodomain or in case of the TALE (three amino acid loop extension) homeobox genes for an atypical homeodomain consisting of 63 amino acids. According to their conserved intron–exon structure and to unique codomain architectures they have been grouped into 14 distinct classes: HD-ZIP I to IV, BEL, KNOX, PLINC, WOX, PHD, DDT, NDX, LD, SAWADEE and PINTOX.<ref name="pmid19734295" /> Conservation of codomains suggests a common eukaryotic ancestry for TALE<ref name="pmid9336443">{{cite journal | vauthors = Bürglin TR | title = Analysis of TALE superclass homeobox genes (MEIS, PBC, KNOX, Iroquois, TGIF) reveals a novel domain conserved between plants and animals | journal = Nucleic Acids Research | volume = 25 | issue = 21 | pages = 4173–80 | date = November 1997 | pmid = 9336443 | pmc = 147054 | doi = 10.1093/nar/25.21.4173 }}</ref> and non-TALE homeodomain proteins.<ref name="pmid17501745">{{cite journal | vauthors = Derelle R, Lopez P, Le Guyader H, Manuel M | title = Homeodomain proteins belong to the ancestral molecular toolkit of eukaryotes | journal = Evolution & Development | volume = 9 | issue = 3 | pages = 212–9 | year = 2007 | pmid = 17501745 | doi = 10.1111/j.1525-142X.2007.00153.x | s2cid = 9530210 }}</ref>