Expression landscape of heterologous enzymes in Synechocystis sp. PCC 6803
This study systematically quantifies the degradation of 103 heterologous enzymes in *Synechocystis* sp. PCC 6803 using a novel split-GFP and CRISPRi approach, revealing that nearly half of these proteins are significantly degraded and demonstrating that swapping enzymes for homologs is often more effective than optimizing genetic elements for improving expression in cyanobacterial cell factories.