NSBP1 (Nucleosome-binding protein 1, Nucleosome-binding protein 45, NBP-45, GARP45 protein) binds specifically to nuclear core particles and acts as a transcriptional activator. It is widely e, Xenopus/Amphibian,pressed with highest levels in subma, Xenopus/Amphibian,illary gland, thymus, kidney and liver and lowest levels in brain, lung,Porcineancreas and eye. Highest levels are found in 7-day-old embryos, which are 4-fold higher than in the adult and almost 10-fold higher than in later embryonic stages.