Pernicious anaemia is caused by a deficiency in vitamin B12, due to atrophic gastritis, an autoimmune condition (immune system destroys self), in this case the parietal cells of the stomach that produce intrinsic factor, a glycoprotein that binds to vitamin B12 in the stomach and is essential for normal absorption of vitamin B12 in the small intestine into the blood
J Pept Sci , 2020, 26(2): e3234
PMID: 19900941
During the post-harvest preservation phase, mushrooms endure abiotic stress, hindering electron transport in their mitochondria and leading to heightened production of reactive oxygen species, as noted by Meitha et al
Brain Behav 5:e00393 DeWire SM, Ahn S, Lefkowitz RJ, Shenoy SK (2007) Beta-arrestins and cell signaling