part of part of has part has part immediate transformation of brain midbrain hindbrain midbrain-hindbrain boundary AAO:0011064 DMBA:16810 EHDAA2:0004395 EHDAA:5789 EMAPA:32857 Lampreys also have an MHB [midbrain hindbrain boundary], expressing a similar repertoire of regulatory gene cognates as in gnathostomes.[well established][VHOG] MHB TAO:0000042 The part of the brain that is the morphological boundary between the midbrain and hindbrain and that is the location of an organizing center which patterns the midbrain and hindbrain primordia of the neural plate. UBERON:0003052 VHOG:0000649 XAO:0000016 ZFA:0000042 consider adding class for organizer. Consider adding separate class for isthmus as a structure isthmic organizer territory isthmo-cerebellar region isthmus isthmus/MHB mid-hindbrain boundary mid-hindbrain junction midbrain hindbrain boundary uberon ectoderm-derived structure anatomical junction midbrain hindbrain boundary neural plate structure with developmental contribution from neural crest