Per Jody's question: there are lots of Abs available against both subtypes Ad Ay, but few if any seem to be advertised as specific for, say, surface antigen and core antigen. You can browse through a number of sources here (http://www.linscottsdirectory.com/search/antibodies): just search for HBV, select WB from Applications filter, and follow "more info" to suppliers' data pages.