Assertion: probe | /r/HasProperty | labeled with more fluorescent molecules
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text: To detect hybridization of the probe to its target sequence, the probe is tagged (or "labeled") with a molecular marker of either radioactive or (more recently) fluorescent molecules; commonly used markers are 32P (a radioactive isotope of phosphorus incorporated into the phosphodiester bond in the probe DNA) or digoxigenin, which is a non-radioactive, antibody-based marker.