Update README.md

README.md

@@ -72,6 +72,11 @@ The dataset began with the AlphaFold Protein Structure Database , undergoing a t
 2. *Second Clustering:* Foldseek further clustered these proteins into 18.8M clusters, expanded to 18.6M proteins by adding diverse members.
 3. *Quality Filtering:* Removed proteins with low pLDDT scores, short lengths, and highly repetitive 3Di-strings. The final training split contains 17M proteins.
 
+## Data Splits
+Data splits into train, test, and, validation were created by moving whole clusters (after quality filtering - see above), to either of the sets. 
+For validation and test, we only kept representatives to avoid bias towards large families. 
+This resulted in 474 proteins for test, 474 proteins for validation and around 17M proteins for training.
+
 ## Citation
 ```
 @article{heinzinger2023prostt5,