REST API - RDF formats

Please list the set of format types that are supported in the API on their example pages

For instance, on http://bio2rdf.org/test/affymetrix

in -> http://bio2rdf.org/affymetrix/describe/rdf/affymetrix:185061_at
there is "rdf", but really this corresponds to "rdf+xml"
and i apparent can also get "nt" for ntriples, and 'n3' or 'turtle'
what other formats are supported?
