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Symposium Headquarters 

Hilton San Francisco Union Square

333 O'Farrell Street
San Francisco, CA 94102

All events will take place in the Hilton San Francisco Union Square Hotel unless otherwise noted. A discounted room block has been reserved by the Protein Society.


The Hilton San Francisco Union Square is just West of Union Square in the heart of the city, bounded by O'Farrell, Mason, Ellis and Taylor Streets. It is approximately a 30-minute drive from the San Francisco International Airport.

Covid-19 Notifications

TPS is adhering to local laws, ordinances and mandates. 

Read the city of San Francisco Health Order, for requirements related to vaccination, testing and exemption for indoor Mega-Events.

Follow the latest CDC COVID-19 Travel Health Information, including vaccination, travel mandates, and testing requirements.

The City of San Francisco has a 82% vaccination rate for its residents. Track the data.


San Francisco International Airport (SFO)

Flying into San Francisco International Airport (SFO)

United Airlines is the leading carrier into SFO, with the most domestic and international flights serving the airport annually. United's domestic flights are based out of Terminal 3, with service in the International Terminal as well. Get started on a trip to San Francisco with United here.


Bay Area Rapid Transit's, or BART's, all-electric trains are a fast, inexpensive, and dependable way to get from SFO to San Francisco easily and avoiding traffic. Once you have your luggage, follow the signs for AirTrain, a free tram service to all terminals. Take either the Red or Blue AirTrain line to the Garage G and BART stop in International Terminal G to take BART. BART fares are based on distance traveled; the greater the distance, the higher the fare. A round-trip fare from SFO to downtown San Francisco is $19.30 ($9.65 one-way). Buy your ticket at ticket machines at the SFO BART station. Then place your ticket at the designated slot on an entry faregate. When it pops out from the top slot, remove it to open the gate and board the San Francisco/Antioch train. When you arrive, repeat the same procedure to exit the station. If you don’t have enough value on your ticket to exit, don’t worry - you can add money to the ticket to exit at the Add Fare machine in the station. Clipper Multi-transit cards ($3 surcharge) are also available for purchase at designated ticket machines in BART stations. It can be used on BART and other transit systems including Muni buses and Street cars in San Francisco.

Cable Cars and Street Cars

Cable cars and street cars are San Francisco’s historic public transit cars. Cable cars are located downtown and run on three lines: Powell-Hyde, Powell-Mason, and California Street. The F-Line streetcar runs up and down Market Street all the way to Fisherman’s Wharf. Pay the conductor onboard or purchase tickets in advance at multiple locations or via smartphone using the MuniMobile app. Exact change is your only option when you are onboard the vehicles.

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