There are 12 allergens associated with cows, 4 of them relate to an allergy to consumption of meat (rather than to the milk they produce).
Serum albumin proteins are responsible for allergic reactions to mammalian meat in general, if allergic to many types of red meat then you may have Alpa-gal Syndrome.
If sensitised to Bovine Serum Albumin (BSA) only, then you may have issues with eating beef and drinking cow’s milk.
I have put together some more comprehensive resources at http://www.allergyresources.co.uk/Beef.php
The allergy resources page for beef covers the key allergens, which allergic syndromes are linked to this allergy and other foods which are commonly cross reactive with beef.
There is also regularly updated links to useful websites specifically for beef allergies and the latest research papers on the topic.
If you have multiple allergies and are interested in how they are linked or want to find out more about food allergies outside the usual top 14 then you can follow me on Facebook or Twitter, where I share a food allergy card every day of the week.