Spray-dried particles comprising one or more recombinant proteins selected from the group consisting of mutants C383S and C383A of the recombinant wild-type oxalate decarboxylase (OxDC) protein according to SEQ. ID No. 1 or SEQ. ID No. 2, or a protein encoded by a sequence selected from SEQ. ID No. 3, SEQ. ID No. 4, SEQ. ID No. 5, SEQ. ID No. 6, SEQ. ID No. 7, SEQ. ID No. 8, SEQ. ID No. 15, SEQ. ID No. 16, SEQ. ID No. 17, SEQ. ID No. 18, or SEQ. ID No. 19； and a polymeric material, in which said proteins are prepared in the form of nano- or micro-agglomerates.Partículas secadas por atomización que comprenden una o más proteínas recombinantes seleccionadas del grupo que consiste en los mutantes C383S y C383A de la proteína recombinante de tipo natural de oxalato descarboxilasa (OxDC) según la SEQ. ID Nº. 1 o SEQ. ID Nº. 2, o una proteína codificada por una secuencia seleccionada de SEQ. ID Nº. 3, SEQ. ID Nº. 4, SEQ. ID Nº. 5, SEQ. ID Nº. 6, SEQ. ID Nº. 7, SEQ. ID Nº. 8, SEQ. ID Nº. 15, SEQ. ID Nº. 16, SEQ. ID Nº. 17, SEQ. ID Nº. 18, o SEQ. ID Nº. 19； y un material polimérico, en las que dichas proteínas se preparan en forma de nano- o micro-aglomerados.
