Shelly and Christopher provided two very good explanations. You may also research the Kansas Brokerage Relationships in Real Estate Transactions Act, commonly referred to as BRRETA on the Kansas Real Estate Commission's website: http://www.kansas.gov/krec/brretact.html
Specifically, a, "broker engaged as a transaction broker is not an agent for either party."
In easier terms, and as previously mentioned, a transaction broker performs administration duties and does not represent either party. A transaction broker is required BY LAW to remain neutral and is prohibited from providing information and acting as an agent for either side. They may provide or facilitate the completion of forms but cannot interpret the information. This may only be performed by an agent or within the confines of an agency agreement. Good luck!