He said: "It's really helpful to have a visit from the Duke and Duchess as they publicise the importance of work we do here.
"The UK and Germany are leaders in this field of stem cell research," said the expert who has been based in Heidelberg for seven years.
He told William and Kate about the latest developments in stem cell research.
The Leeds University graduate, told them how his team focuses on the question whether and how an accumulation of DNA damage in stem cells is the causes for ageing of an organ system.
Such damage may cause exhaustion of the stem cell pool and loss of the organ's capacity to regenerate. The work is particularly important in research into leukaemia.
William said, "Ladies first" when he was asked to look at the cells through a microscope.
Afterwards Kate said: "It's in 3D too, which is amazing."
The British stem cell researcher leads the junior research group Experimental Hematology.
He added said: "I had never imagined that I would one day be presenting my research to my future King. This will be a very moving and exciting meeting for me"
Dr. Michael Baumann, chairman and scientific chair of the DKFZ - the centre's German initials - said afterwards: "We are very proud that the Duke and Duchess of Cambridge have decided to visit the DKFZ. They have made a clear gesture which underlines the great importance of medical research for our society."
His colleague, Prof Dr. Josef Puchta, commercial chairman, added: "The decision to come to the DKFZ also serves to show that we are recognized internationally as a leading research institution."
The royals were welcomed by Winfried Kretschmann, governor of the state of Baden-Württemberg, and the board of directors of the DKFZ.
They also met the Nobel Prize winner and long-time chairman of the DKFZ, Professor Harald zur Hausen, for a brief conversation.
Zur Hausen identified the Papillomavirus as the cause of cervical cancer and therefore paved the way for the development of a vaccine against this illness.
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