PT - JOURNAL ARTICLE AU - P. Mehrabi AU - R. Bücker AU - G. Bourenkov AU - H.M. Ginn AU - D. von Stetten AU - H.M. Müller-Werkmeister AU - A. Kuo AU - T. Morizumi AU - B.T. Eger AU - W.-L. Ou AU - S. Oghbaey AU - A. Sarracini AU - J.E. Besaw AU - O. Paré-Labrosse AU - S. Meier AU - H. Schikora AU - F. Tellkamp AU - A. Marx AU - D.A. Sherrell AU - D. Axford AU - R. Owen AU - O.P. Ernst AU - E.F. Pai AU - E.C. Schulz AU - R.J.D. Miller TI - Serial femtosecond and serial synchrotron crystallography yield data of equivalent quality: a systematic comparison AID - 10.1101/2020.08.21.257170 DP - 2020 Jan 01 TA - bioRxiv PG - 2020.08.21.257170 4099 - http://biorxiv.org/content/early/2020/08/22/2020.08.21.257170.short 4100 - http://biorxiv.org/content/early/2020/08/22/2020.08.21.257170.full AB - For the two proteins myoglobin (MB) and fluoroacetate dehalogenase (FAcD), we present a systematic comparison of crystallographic diffraction data collected by serial femtosecond (SFX) and serial synchrotron crystallography (SSX). To maximize comparability, we used the same batch of crystals, the same sample delivery device, as well as the same data analysis software. Overall figures of merit indicate that the data of both radiation sources are of equivalent quality. For both proteins reasonable data statistics can be obtained with approximately 5000 room temperature diffraction images irrespective of the radiation source. The direct comparability of SSX and SFX data indicates that diffraction quality is rather linked to the properties of the crystals than to the radiation source. Time-resolved experiments can therefore be conducted at the source that best matches the desired time-resolution.Competing Interest StatementThe authors have declared no competing interest.