When the double stranded DNA helix is unwound, two single strands of DNA are formed. These strands have to be stabilized because their hydrophobic bases are exposed to water. The proteins that stabilize the two single strands are called

single-strand DNA-binding protein

Explanation:

Based on the scenario being described within the question it can be said that these proteins are known as single-strand DNA-binding protein. They are protein mainly in the E. Coli bacteria, and bind to single-straded regions of DNA. They are a main functional part of everything related to DNA metabolism such as replication, recombination, and repair.

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