ISSN:
1432-0827
Keywords:
Phosphopeptides
;
γ-Carboxyglutamic Acid
;
Calcified Cartilage
;
Phosphoserine
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
,
Physics
Notes:
Summary Uncalcified cartilage from the epiphyseal portion of bovine scapulae, both distant and adjacent to the epiphyseal growth plate, and the calcified cartilage of the epiphyseal growth plate itself were analyzed for the presence of O-phosphoserine [Ser(P)], O-phosphothreonine [Thr(P)] and γ-carboxyglutamic acid (Gla). Only trace amounts of these Ca2+-binding amino acids or the peptides containing them were found in the unmineralized tissues. In contrast, whole calcified cartilage, and especially the most mineralized fraction obtained by density centrifugation, contained considerable amounts of all three amino acids. Essentially all of the Gla and the majority of the Ser(P) and Thr(P) were present in non-collagenous, non-diffusible proteins extractable in EDTA at near-neutral pH.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02441183
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