Question

Which of the isotopes listed in Table could be used to specifically label a protein? A nucleic acid?

Type of Radiation
Half-Life
Radionuclide
12.31 years
14C
5715 years
B+
110 minutes
18F
B*, Y
22Na
2.60 years
32p
14.28 days
87.2 days
B
35S
45Ca
162.7 days
5.271 years
B. Y
"Co
1251
59.4 days
8.02 days
B. Y
1311
"B particles are electrons, B* particles are positrons, and y rays are photons.
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Transcribed Image Text

Type of Radiation Half-Life Radionuclide 12.31 years 14C 5715 years B+ 110 minutes 18F B*, Y 22Na 2.60 years 32p 14.28 days 87.2 days B 35S 45Ca 162.7 days 5.271 years B. Y "Co 1251 59.4 days 8.02 days B. Y 1311 "B particles are electrons, B* particles are positrons, and y rays are photons.

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