Had PE and IB experience this summer...what to put on resume?

I worked for a private equity boutique this summer but one of the MDs brought in a biotech startup and so our firm became its advisor to assist in raising money for its Series A round and soforth. I worked on this deal quite a bit but I'm just confused how to explain this on my resume. Do I put my title as private equity SA and then include a bullet point about this investment banking experience? Just not sure how to word it or if it seems weird at all.