Fig. 5: The Allorecognition Complex and its expression.
From: The Hydractinia cell atlas reveals cellular and molecular principles of cnidarian coloniality
A Region on chromosome 3 of Hydractinia depicting the Allorecognition Complex (ARC) including Alr1 and Alr-like genes. B UMAP expression plot of LOC130635943, an Alr1 gene. C Single confocal slice of Alr1 immunofluorescence in a feeding polyp, showing Alr1 localisation in the epidermis. Scale bar = 80 μm. Zoom is highlighted in yellow. Scale bar = 30 μm. D Maximum projection of a confocal stack of Alr1 immunofluorescence in a feeding polyp. Scale bar = 80 μm. Zoom highlighted in green shows a growing stolon. Scale bar = 40 μm. E Two feeding polyps grafted at the aboral end. Scale bar = 500 μm. F Histological section of the interface between two isogeneic polyps, showing tissue continuity of epidermis and gastrodermis. Arrows point to the new mesoglea. M old mesoglea, EK epidermis, EN gastrodermis. G Histological section of the interface of two incompatible, allogeneic polyps. M1 old mesoglea, M2 new mesoglea, GVC gastrovascular ca vity.
