Data Model Design

You are the manager of a bioinformatics support service and need to build a database to manage data from your users' studies. Define a data model (entities, atributes and relationships) to hold data from this case:
A series of proteomics analysis. Data should include: 1) Sample and user details, 2) Experimental protocols used, 3) Protein sequences found, 4) Identified proteins from sequences, 5) References.

Proteomics analysis data model:

Interpretation of the data model: