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Measurement of 25-hydroxyvitamin D2, 25-hydroxyvitamin D3, 24,25-dihydroxyvitamin D2 and 25,26-dihydroxyvitamin D2 in a single plasma sample by mass fragmentography

✍ Scribed by Ruth D. Coldwell; D.J.H. Trafford; M.J. Varley; D.N. Kirk; H.L.J. Makin


Book ID
115826668
Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
713 KB
Volume
180
Category
Article
ISSN
0009-8981

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## Abstract The 25‐hydroxyvitamin D~3~‐24‐hydroxylase mRNA is tightly and reciprocally regulated by 1,25‐dihydroxyvitamin D~3~ (1,25(OH)~2~D~3~) and parathyroid hormone (PTH). The upregulation of the 24‐hydroxylase by 1,25(OH)~2~D~3~ is well established and occurs at the transcriptional level throu