Which protein characteristic is essential for identifying successful cloning?

Identifying successful cloning of a protein often relies on specific characteristics that indicate whether the cloned gene is being expressed correctly and producing the desired protein. The ability to fluoresce under UV light is a key trait associated with Green Fluorescent Protein (GFP), which makes it particularly useful as a reporter gene in cloning experiments.

When a clone expresses the GFP protein, it can be easily monitored using fluorescence imaging techniques, allowing for immediate visualization of its presence in cells or tissues. This characteristic acts as a straightforward confirmation that the cloning process was successful and that the gene of interest has been properly inserted and expressed within the host organism.

In contrast, the other protein characteristics listed do not provide the same clear-cut indicator of successful cloning or expression.