Information on how to tell whether a run is RNA-seq or not

1 files changed, 8 insertions, 3 deletions

diff --git a/Code/download_ena_experiment_records.py b/Code/download_ena_experiment_records.py
index 11bfc70..d96071f 100644
--- a/Code/download_ena_experiment_records.py
+++ b/Code/download_ena_experiment_records.py
@@ -5,10 +5,15 @@
 #
 # Note:
 # (1) The experiment accession IDs are stored in ../Data/information/experiment_ids_lacking_strategy_or_source.txt
-# (2) Given an experiment's accession SRX6711770, we can get its full information from the following link
-#     https://www.ebi.ac.uk/ena/browser/api/xml/SRX6711770
+# (2) Given an experiment's accession SRX6711770, we can get its full information (e.g., whether it is RNA-seq) from the following link https://www.ebi.ac.uk/ena/browser/api/xml/SRX6711770
+# (3) Each run is associated with an experiment. Therefore, we can find whether the run is RNA-seq by first finding its associated experiment accession, then from the experiment
+#     accession finding its library strategy and library source.
+#     For example, for run SRR23878410, from https://www.ebi.ac.uk/ena/browser/api/xml/SRR23878410 we know that its associated experiment accession is SRX19690458, and
+#     from https://www.ebi.ac.uk/ena/browser/api/xml/SRX19690458 we know that its library strategy is RNA-seq and its library source is TRANSCRIPTOMIC.
 #
-# 2025-10-23
+# Last modified by Hui on:
+#   2025-10-23
+#   2025-10-24
 
 import urllib.request
 import os, time, glob