Organic phosphorous distribution in chicken bone matrix
نویسندگان
چکیده
Non-collagenous, soluble proteins and collagen have been extracted quantitatively from freshly dissected chicken bone at 4 ûC in presence of protease inhibitors, and their content in organic phosphorus assayed. We found that non-collagenous proteins were not covalently bound to collagen in chicken bone, as in some calcified tissues. They represented 30 p. 100 of the organic matrix and bound 75 p. 100 of the organic phosphorus. Collagen accounted for 70 p. 100 of the organic matrix and bound 25 p. 100 of the organic phosphorus. The presence of phosphate groups covalently linked to proteins in the bone matrix may play an important role as mineralization sites.
منابع مشابه
Identification of Organic Phosphorus Covalently Bound to Collagen and Non-Collagenous Proteins of Chicken-Bone Matrix THE PRESENCE OF O-PHOSPHOSERINE AND O-PHOSPHOTHREONINE IN NON-COLLAGENOUS PROTEINS, AND THEIR ABSENCE FROM PHOSPHORYLATED COLLAGEN By LOLA COHEN-SOLAL,*
Non-collagenous phosphoproteins, almost all of which can be extracted in EDTA at neutral pH in the presence of proteinase inhibitors, are identified in the matrix of chicken bone, and are therefore not covalently bound to collagen. Similarly, all the peptides containing y-carboxyglutamic acid are present in the EDTA extract and none in the insoluble residue, confirming that none is covalently l...
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