Claim: Sinaida Rosenthal obtained her habilitation at Humboldt University for her dissertation entitled "On the Mechanism of Ribosome breakdown in Rabbit Reticulocytes," before becoming a professor of Physiology and Biology.
Evidence: It was also at the Humboldt that she received her doctorate, in 1960, for a dissertation entitled "Protein Release from Rat Liver Mitochondria" ("Eiweißfreisetzung aus Rattenlebermitochondrien"), and later, in 1969, her habilitation (higher level qualification) for which she was supervised by Samuel Mitja Rapoport. On this occasion her dissertation was entitled "On the Mechanism of Ribosome break down in Rabbit Reticulocytes" (" Über den Mechanismus des Ribosomenabbaus von Kaninchenretikulozyten"). In 1969, still at the Humboldt, she was appointed Professor for Physiology and Biology.