Nucleic acid molecules which encode a branching enzyme from a bacterium of
the genus Neisseria, vectors, host cell, plant cells and plants
containing said nucleic acid molecules as well as starch obtainable from
the plants described are described. Furthermore, an in-vitro method for
producing .alpha.-1,6-branched .alpha.-1,4-glucans on the basis of
sucrose and a combination of enzymes of an amylosucrase and a branching
enzyme as well as the .alpha.-1,6-branched .alpha.-1,4-glucans obtainable
by said method are described.