Molecular Cloning and Construction of agp Gene Deletion-mutant in Cyanobacterium Synechocystis sp. PCC 6803 Relationship Between the Growth of Synechocystis sp. PCC 6803 on Medium with Glucose and the Photosynthetic Energy Transformation The Integration and Expression of ββ Mutant Gene of Human Liver Metallothionein in Synechocystis sp. PCC 6803 by Homology Recombination Studies on the Purification, Characterization and Conformati on in Solution of Metallothionein like Substance from Synechocystis 6803