Today, most commercial varieties of this antibiotic are produced by the mold P. chrysogenum
[DOC] [TLE] Penicillium chrysogenum - MicrobeWiki [PAR] Aug 20, 2010 ... Penicillium chrysogenum is a widely studied species of Penicillium and is ... to 
lyze and that the active factor could be extracted by filtration of the mold.