Fig. 3From: Rapamycin golden jubilee and still the miraculous drug: a potent immunosuppressant, antitumor, rejuvenative agent, and potential contributor in COVID-19 treatmentBiosynthetic gene clusters of rapamycin in Streptomyces hygroscopicus ATCC29253 (a), and Actinoplanes sp. N902-109 (b)Back to article page