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Collagen (/ ˈ k ɒ l ə dʒ ə n /) is the main structural protein in the extracellular matrix of the connective tissues of many animals. It is the most abundant protein in mammals, [1] making up 25% to 35% of protein content. Amino acids are bound together to form a triple helix of elongated fibril [2] known as a collagen helix.
Thyroid follicular cells form a simple cuboidal epithelium and are arranged in spherical thyroid follicles surrounding a fluid filled space known as the colloid. The interior space formed by the follicular cells is known as the follicular lumen .
Collagen α-1 (XXIII) chain is a protein encoded by COL23A1 gene, which is located on chromosome 5q35 in humans, and on chromosome 11B1+2 in mice. [5] The location of this gene was discovered by genomic sequence analysis. Collagen XXIII is a type II transmembrane protein and the fourth in the subfamily of non-fibrillar transmembranous collagens ...
Type III collagen is a known ligand for the receptor GRP56. The first single base mutation in the COL3A1 gene was reported in 1989 in a patient with vEDS and changed a glycine amino acid to a serine [ 20 ] Since then, over 600 different mutations have been characterized in the COL3A1 gene. [ 21 ]
Tryptophan contains an α-amino group, an α-carboxylic acid group, and a side chain indole, making it a polar molecule with a non-polar aromatic beta carbon substituent. Tryptophan is also a precursor to the neurotransmitter serotonin, the hormone melatonin, and vitamin B 3 (niacin). [4] It is encoded by the codon UGG.
Type I collagen is the most abundant collagen of the human body, consisting of around 90% of the body's total collagen in vertebrates. Due to this, it is also the most abundant protein type found in all vertebrates. Type I forms large, eosinophilic fibers known as collagen fibers, which make up most of the rope-like dense connective tissue in ...
“Small dips or spikes in hormone levels can cause unpleasant symptoms like difficulty losing weight or sleeping, but can generally be managed through a balanced diet, regularly scheduled meals ...
Collagen alpha-1(XIII) chain is a protein that in humans is encoded by the COL13A1 gene. [5]This gene encodes the alpha chain of one of the nonfibrillar collagens. The function of this gene product is not known, however, it has been detected at low levels in all connective tissue-producing cells so it may serve a general function in connective tissues.