Update README.md

README.md

@@ -2,4 +2,16 @@ Transcript isoform expression dataset curated following the preprocessing pipeli
 
 * training set: `train_i.tsv`, where i=1,...,19 denotes chromosome i.
 * validation set: `validation.tsv`, corresponds to chromosome 20.
-* test set: `test.tsv`, corresponds to chromosomes 21 and 22.
+* test set: `test.tsv`, corresponds to chromosomes 21 and 22.
+
+Columns in each file:
+* transcript_id
+* gene_id
+* labels_i (i=0,...,29): transcript isoform expression level in 30 tissues.
+* chromosome
+* tss
+* tes
+* strand
+* rna_seq
+* protein_seq
+* dna_seq