**Macromolecular
Size (Macromol Size)**

Number of chains of the model.

**Stoichiometry
(Stoich)**

Character representation of the assembly composition . For homooligomers it is just "A"+Macromol Size . For heterooligomers the stoichiometry is a combination of the number of chains coming from each target. A way to calculate this would be to look at the target models before concatenating, and report the number of chains in each one. The stoichiometry then would be calculated by sorting in descending order the list of sizes and attaching a letter of the alphabet before each size. For example: A2B2, or A3B2C1.

**Symmetry (Symm)**

Character representation of the symmetry group.

**Symmetry Size
(Symm Size)**

Number of chains involved in the symmetry.

**Symmetry RMSD
(Symm RMSD)**

The RMSD between chains using the symmetry axes.

**Total Number of
Contacts (No. conts)**

The total sum of the number of residue contacts between all interfaces (chain pairs).

**Total Number of
Clashes (No.clash)**

The total sum of the number of residue clashes between all interfaces (chain pairs).

**F1, Precision, Recall, Jaccard coefficient.**

The weighted sums of the corresponding measures (below) derived for all reproduced interfaces. The score for each chain-chain interface is weighted by the number of contacts in the corresponding interface in the target.

**F1**

F1 is the harmonic mean of the precision and recall
(see below) and is calculated according to the formula:

F1 = 2*precision*recall/(precision+recall) * 100%.

**Precision**

Precision of a multimeric prediction is the percentage of the correct interchain contacts among all interchain contacts in the model. The precision is calculated according to the formula:

Prec = TP/(TP+FP) * 100%,

where TP and FP are the numbers of correct and incorrect interchain contacts, correspondingly, in the predicted structure.

**Recall**

Recall of a multimeric prediction is the percentage of correctly reproduced native interchain contacts. The recall is calculated according to the formula:

Recall = TP/Nc *100%,

where TP is the number of correctly predicted interchain contacts,

Nc is the number of all interchain contacts in the target structure.

**Jaccard Coefficient**

Jaccard Coefficient shows similarity of the target and model interfaces and is calculated on residues involved in interchain contacts. Jaccard Coefficient is calculated according to the formula:

Jaccard Coefficient = (M11)/(M10+M10+M11),

where M01 is the number of the model interface residues that are not present in the target interface,

M10 is the number of the target interface residues that are not present in the model interface,

M11 is the number of interface residues that are present both in the model and the target.

**Contact Agreement
Score (QS)**

The QS score reflects the fraction of correctly modeled interface contacts in the complex (numerator) over the maximum number of either correct or predicted contacts (denominator).

**lDDT**

The lDDT score calculates the differences of the inter-atomic distances in model and target.

**Assembly
Alignment Size (Align. Size)**

Number of chains of the model aligned to the target.

**Assembly
Alignment Length (Align. Length)**

The length of the assembly alignment in number of aligned residues.

**Orientation
Angle Deviation (Orient)**

The maximum angle deviation (in radians) between the orientation of a pair of aligned chains.

**Global RMSD**

The global RMSD from the superposition of all chains based on the lowest RMSD chain matching.

**Local RMSD**

The RMSD from the superposition of the subset of aligned chains.

**Interface
Residue RMSD **

The minimum RMSD of the superposition between target and model chains based on the interacting residues in the target.