Abstract: Capture membranes for lanthanide metal ions can be made from fusion proteins having at least one lanthanide metal binding sequence (SEQ ID NO: 1-4) covalently bound to a silk-elastin-like polymer (SELP). Capture membranes can be made from silk nanofibrils that are surface-modified with a lanthanide metal binding molecule. The capture membranes can have a layered structure or can contained cross-linked peptides in a hydrogel.

Abstract: The present disclosure provides a microorganism and expression cassette useful for biologically producing PHA ho-mopolymers and/or PHA copolymers, including PHB-co-MCL copolymers of controllable or predetermined composition. In embodiments, the present disclosure provides a nucleic acid construct suitable for use in a microorganism and/or expression cassette including a nucleic acid construct including: one or more genes comprising a phaJ4 gene, a phaA gene, a phaB gene, a phaC1 gene, or combinations thereof; a cDNA that encodes one or more proteins comprising an enoyl-CoA hydratase 2, a ?-ketothiolase, an acetoacetyl-CoA reductase, a type II poly hydroxyalkanoate synthase, or combinations thereof; or one or more nucleic acid sequences that encode one or more proteins including an enoyl-CoA hydratase 2, a ?-ketothiolase, an acetoacetyl-CoA reductase, a type II poly hydroxyalkanoate synthase, or combinations thereof.