The present invention relates to a process for the enzymatic production of a dipeptide composition from a cyanophycin (CGP) or CGP-like polymer preparation by degrading the polymer preparation with an CGPase, a CGPase particularly adapted for said process, and the use of cyanophycin (CGP) or CGP-like polymers or fragments thereof, notably a dipeptide composition obtained by the process as defined above, as pharmaceutical composition, medicament, or as food or feed substitute.

The present disclosure relates to genetically modified bacteria, wherein said genetically modified bacteria is designed to express or overexpress a heme-containing protein. Said protein is optionally expressed or overexpressed in combination with one or more enzymes that catalyze the heme synthesis pathway. Said genetically modified organism allows scalable production of heme-containing protein with the advantage that the expressed protein remains in soluble form without forming inclusion bodies.