Details of experiments between the fragments Q5T5U3~47-159 and A6NIM6~570-579
Note that the results of all experiments are listed, regardless of the modification states of the fragments.



Experiment series 1

Protein A protein: ARHGAP21
Protein A fragment: 47-159
Protein A site: PDZ
Protein A construct: his6-MBP-TEVsite-PDZ

Protein B protein: SLC15A5
Protein B fragment: 570-579
Protein B site: PBM
Protein B sequence: SSIDLWETAL
Protein B construct: biotin-ttds-SSIDLWETAL

Average holdup BI: -0.04
Immobilized partner concentration in holdup experiment (10-6M): 3.5
Experiment method: SAPF_holdup
Details of affinity fitting: fluorescein + mCherry internal standards + normal layout
PUBMED ID of publication: 36115835
Number of measurements: 1
The affinity was below the detection threshold of the assay.


Experiment series 2

Protein A protein: ARHGAP21
Protein A fragment: 47-159
Protein A site: PDZ
Protein A construct: his6-MBP-TEVsite-PDZ

Protein B protein: SLC15A5
Protein B fragment: 570-579
Protein B site: PBM
Protein B sequence: SSIDLWETAL
Protein B construct: biotin-ttds-SSIDLWETAL

Average holdup BI: 0.26
Holdup BI standard deviation: 0.01
Normalized holdup BI: 0.26
Normalized holdup BI standard deviation: 0.01
Immobilized partner concentration in holdup experiment (10-6M): 11
Experiment method: DAPF_holdup
Details of affinity fitting: fluorescein + mCherry internal standards + normalization based on CALIP_holdup data + reverse layout
PUBMED ID of publication: 36115835
Number of measurements: 2
Measured pKd: 4.55


Experiment series 3

Protein A protein: ARHGAP21
Protein A fragment: 47-159
Protein A site: PDZ
Protein A construct: his6-MBP-TEVsite-PDZ

Protein B protein: SLC15A5
Protein B fragment: 570-579
Protein B site: PBM
Protein B sequence: SSIDLWETAL
Protein B construct: biotin-ttds-SSIDLWETAL

Average holdup BI: 0.26
Normalized holdup BI: 0.26
Immobilized partner concentration in holdup experiment (10-6M): 11
Experiment method: DAPF_holdup
Details of affinity fitting: fluorescein + mCherry internal standards + normalization based on CALIP_holdup data + reverse layout
Experimental details: not reported internal standards of holdup layout #5
Number of measurements: 1
Measured pKd: 4.55


Experiment series 4

Protein A protein: ARHGAP21
Protein A fragment: 47-159
Protein A site: PDZ
Protein A construct: his6-MBP-TEVsite-PDZ

Protein B protein: SLC15A5
Protein B fragment: 570-579
Protein B site: PBM
Protein B sequence: SSIDLWETAL
Protein B construct: Biotin-ado-ado-SSIDLWETAL

Average holdup BI: 0.42
Normalized holdup BI: 0.42
Immobilized partner concentration in holdup experiment (10-6M): 18
Experiment method: DAPF_holdup
Details of affinity fitting: fluorescein + mCherry internal standards + normalization based on CALIP_holdup data + reverse layout
Experimental details: Crude peptide synthesis product. The peptide concentration in the affinity conversion step may differ from reality. Not reported internal standards of holdup layout #6
PUBMED ID of publication: 36115835
Number of measurements: 1
Measured pKd: 4.65