KEY RESOURCES TABLE

REAGENT or RESOURCE	SOURCE	IDENTIFIER
Bacterial and Virus Strains
E. coli BL21(DE3) competent cells	New England Biolabs	Cat# C2527I
Chemicals, Peptides, and Recombinant Proteins
Recombinant SaBphP2, aa 1 – 489	(Sanchez et al., 2019)	N/A
50% w/v PEG 4000	Hampton Research	HR2-529
20% w/v Benzamidine Hydrochloride	Hampton Research	HR2-428-69
1M Sodium citrate tribasic dihydrate pH 5.6	Hampton Research	HR2-935-15
Nuclear grade grease	Super Lube	42150
Deposited Data
SaBphP2 PCM structure 5 ns after laser excitation	This paper	PDB: 7JR5
SaBphP2 PCM structure 33 ms after laser excitation	This paper	PDB: 7JRI
SaBphP2 PCM structure, reference in the dark	(Sanchez et al., 2019)	PDB: 6PTQ
Recombinant DNA
pET28c-SaBphP2 PCM (1–489aa)	(Sanchez et al., 2019)	N/A
Software and Algorithms
Data processing pipeline at SACLA	(Nakane et al., 2016)
Cheetah	(Barty et al., 2014)	https://github.com/biochem-fan/
CrystFEL	(White et al., 2016)	https://github.com/biochem-fan/
Structural Modeling: Coot	(Emsley et al., 2010)	https://www.ccp4.ac.uk/
Structural Refinement: Refmac	(Murshudov et al., 2011)	https://www.ccp4.ac.uk/
Pearson Correlation Coefficient, pcc.f	This paper	Available from lead contact
UCSF chimera	(Pettersen et al., 2004)	https://www.cgl.ucsf.edu/chimera/
Other
TALON® Metal Affinity Resin	Takara Bio	Cat# 635503
Amicon Ultra Centrifugal Filters	Millipore Sigma	Cat# UFC901024