Update README.md

README.md

@@ -19,3 +19,18 @@ configs:
   - split: train
     path: data/train-*
 ---
+
+# SHS27k
+
+Popular multiclass PPI dataset from [Chen et al.](https://academic.oup.com/bioinformatics/article/35/14/i305/5529260?login=false).
+
+Labels correspond to the following PPI types
+```
+PTM: 0
+Reaction: 1
+Catalysis: 2
+Inhibition: 3
+Binding: 4
+Activation: 5
+Expression: 6
+```