Update README.md

README.md

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-Welcome to SaprotHub! SaprotHub is a collaborative community, aiming to empowers biologists by enabling them to create and train their own models without the need for advanced ML and coding expertise. We provide various preprocessed datasets and fine-tuned model checkpoints for users to directly utilize.
+Welcome to SaprotHub! SaprotHub is a collaborative community that empowers biologists to create and train models without requiring advanced ML and coding expertise. Through ColabSaprot, biologists can share their trained models for direct use or further re-training by others.
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+When using shared models, please cite the original publications where available.
 
 ColabSaprot:
 <a href="https://colab.research.google.com/github/westlake-repl/SaprotHub/blob/main/colab/SaprotHub_v2.ipynb"><img src="https://colab.research.google.com/assets/colab-badge.svg" style="max-width: 100%;"></a>