Details of experiments between the fragments Q86SQ0~195-204 and P31947~1-248
Note that the results of all experiments are listed, regardless of the modification states of the fragments.



Experiment series 1

Protein A protein: PHLDB2
Protein A fragment: 195-204
Protein A site: 14-3-3_pSer200
Protein A modification: (SEP)200
Protein A sequence: RSGAASMPSS
Protein A construct: RSGAA(pSer)MPSS (crude synthetic peptide)

Protein B protein: SFN
Protein B fragment: 1-248
Protein B site: 14-3-3
Protein B construct: avi-his6-MBP-TEVsite-14-3-3sigma

Average holdup BI: 0.76
Holdup BI standard deviation: 0.02
Immobilized partner concentration in holdup experiment (10-6M): 142
P value (usually -log10(P Two-sided unpaired T-test), but double check the experimental details): 9.7
Experiment method: HU Multiplex
Details of affinity fitting: hyperbolic binding equation
Date of measurement: 2021.10.13.
Experimental details: -log10(P Two-sided unpaired T-test (4 vs 5))
Number of measurements: 5
Measured pKd: 4.34


Experiment series 2

Protein A protein: PHLDB2
Protein A fragment: 195-204
Protein A site: 14-3-3_pSer200
Protein A modification: (SEP)200
Protein A sequence: RSGAASMPSS
Protein A construct: RSGAA(pSer)MPSS (crude synthetic peptide)

Protein B protein: SFN
Protein B fragment: 1-248
Protein B site: 14-3-3
Protein B construct: avi-his6-MBP-TEVsite-14-3-3sigma

Average holdup BI: 0.73
Holdup BI standard deviation: 0.05
Immobilized partner concentration in holdup experiment (10-6M): 113
P value (usually -log10(P Two-sided unpaired T-test), but double check the experimental details): 4.82
Experiment method: HU Multiplex
Details of affinity fitting: hyperbolic binding equation
Date of measurement: 2022.02.17.
Experimental details: -log10(P Two-sided unpaired T-test (4 vs 4))
Number of measurements: 4
Measured pKd: 4.38


Experiment series 3

Protein A protein: PHLDB2
Protein A fragment: 195-204
Protein A site: 14-3-3_pSer200
Protein A modification: (SEP)200
Protein A sequence: RSGAASMPSS
Protein A construct: RSGAA(pSer)MPSS (crude synthetic peptide)

Protein B protein: SFN
Protein B fragment: 1-248
Protein B site: 14-3-3
Protein B modification: 100_uM_FCA
Protein B construct: avi-his6-MBP-TEVsite-14-3-3sigma

Average holdup BI: 0.63
Holdup BI standard deviation: 0.12
Immobilized partner concentration in holdup experiment (10-6M): 111
P value (usually -log10(P Two-sided unpaired T-test), but double check the experimental details): 3.22
Experiment method: HU Multiplex
Details of affinity fitting: hyperbolic binding equation
Date of measurement: 2022.02.17.
Experimental details: -log10(P Two-sided unpaired T-test (4 vs 4))
Number of measurements: 4
Measured pKd: 4.18