According to people with knowledge of the matter, a private equity firm is interested in buying Immucor Inc.

The people asked not to be identified because the information isn't public, say that TPG is working with an adviser on possible options for the company it took private about a decade ago. The people said that some private equity firms are interested.

The people said that the company could be sold for more than $2 billion. The discussions are at an early stage and it's possible that the company will be kept longer.

A representative for the company wouldn't speak. Immucor couldn't be reached.

Immucor agreed to go private and sell itself to a private equity firm. The company has made several acquisitions since then.

Immucor makes a variety of products used in the screening of blood. Testing before and after organ transplants is done by laboratories.