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Figure 1: Structure of selected retinoids.
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Figure 2. RA-mediated gene transcription via RAR/RXR binding to RARE.
Transcription of target genes
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Figure 3. Primary (yellow) and secondary (blue) lymphoid organs of the immune system.
Adapted from (44).
tonsils
lymphatic vessels lymph nodes spleen adenoid
thymus
bone marrow Peyer’s patches in small intestine
appendix
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