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Nutritional Biochem > Selenium > Flashcards

Flashcards in Selenium Deck (15)
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1

what are the 4 structures of selenium

1. selenomethionine
2. selenocyteine
3. selenite
4. selenate

2

best source of selenium

seafood

3

T/F cancer rates are higher in people who live in areas that have low soil selenium concentrations

T

4

what enhances the absorption of selenium

vitamin A,C,E
glutathione

5

what carries 60% of selenium in plasma as selenocysteine

selenoprotein P

6

what can be used as an indicator of selenium def.

selenoprotein P

7

selenide can be methylated and excreted in urine as

methyl selenide

8

selenocysteine synthesized by 2 enzymes

1. selenophophate synthetase
2. slenocysteine synthase

9

selenium is incorporated into selenoproteins as _____ via

selenocysteine via selenocysteine tRNA

10

what two proteins does selenocysteine tRNA require

1. SBP2
2. EFsec

11

___ and __ account for 90% of selenium in the plasma

GPX3 and selenoprotein P

12

thioredoxin reductase is used in synthesis of _____ for DNA synthesis

deoxyribonucleotides

13

_____ is found in cytosol for cardiac and skeletal muscle

selenoprotein W

14

_____ observed in miners and people who consume selenium from supplements

selenosis

15

UI is

400 micrograms/day