Stella Stefanova
Head of the FACS Core Facility
Could you briefly describe your role at the Biozentrum?
I am the head of the FACS Core Facility at the Biozentrum. FACS stands for fluorescence-activated cell sorting. We work closely with researchers, who bring their fluorescently labeled samples to be analyzed using FACS, for example to identify different cell types or cells expressing specific proteins. With the FACS, we can also separate individual cells from a mixed population. It’s an incredible machine that can sort between 10,000 and 20,000 cells per second. At the end, we have pure cell population. So, this machine can really enrich for a certain population.
What do I like about your job?
I like everything about it. I enjoy working with the instruments, troubleshooting and hands-on tasks, such as fixing technical issues. There is the biology knowledge you need, a bit of the chemistry related to fluorescent probes, and some a physics, especially when it comes to the machines and the lasers. On top of that, there is the interaction with the people, which makes the work especially exciting.
What’s your scientific background?
I started my scientific journey in the US. I had some very good mentors who encouraged me to continue working with flow cytometry. I worked with very good people with very good teams. Later, I had the opportunity to join the FACS Core Facility at the Biozentrum, for which I am very thankful.
Do you have female role models in science?
Actually, I have been very fortunate to have several female role models throughout my career in flow cytometry. It started in the United States, in New York City, with Betty Diamond, one of the first women to graduate from medical school at the time. She's now in her 70s and still active in research. Another important role model is my mentor, Christy Gordon, who worked with Betty Diamond and taught me flow cytometry. She's my colleague and a dear friend. There is also Fiona Deutsch, PI at the Biozentrum, whom I had the privilege to meet in New York City, when she was just starting her career. Her journey is very inspiring and I am grateful to share part of it with her.
How do you think we can achieve gender equality?
I am a woman and a mother of three – two boys and a girl. As a female scientist, I personally believe it has to start from within the family. For me, it’s about encouraging my daughter to follow her dreams. By instilling strong values within the family so that children can learn to respect one another, grow with awareness, and understand the importance of equality. Open discussions within the family help prepare them to step out into the world with these values.