Host: Anacystis nidulans and Synechococcus cedrorum

May be causative agent of disappearance of cyanobacteria (biocontrol)

Isolated from wastewater stabilization pond in Florida

Structure: resembles T even bacteriophage, icosahedral protein coat, long contractile tail and 91 kb double stranded DNA with GC content of 53-54%

The DNA metabolism of AS-1 with its phage-induced light (PIL) DNA has previously been studied

Current interest: molecular cloning of AS-1 DNA and phylogenetic comparison with other marine and fresh water cyanophage and cyanobacteria

One of the goals of this project is to use specific sequences of AS-1 DNA as a probe to detect the presence of AS-1 in aquatic environments