FK-AK space

In functional analysis and related areas of mathematics an FK-AK space or FK-space with the AK property is an FK-space which contains the space of finite sequences and has a Schauder basis.
Properties.
An FK-AK space "E" has the property
that is the continuous dual of "E" is linear isomorphic to the beta dual of "E".
FK-AK spaces are separable.