Beer has very little protein. Most offers one gram or less of protein per serving. There are several websites that detail the nutritional breakdown of most brands of beer.
Well every beer is brewed differently so the protein values of each are different. Light beers like Michelob Ultra have around. 5grams or protein where as some normal beers can have upwards of 2. 5grams total.
An average regular beer contains 1. 07 grams of protein, whereas a light beer contains 0. 71 grams. This is one reason why alcoholics tend to gain weight.