👉 The UniProtKB Fluid is a specialized database entry within the UniProt Knowledge Base that describes fluid proteins, which are biological molecules that exist in solution rather than being associated with solid structures like proteins or nucleic acids. These proteins are typically involved in cellular transport, signaling, and maintaining osmotic balance. The UniProtKB Fluid provides detailed information on the amino acid sequences, structures, functions, and interactions of these fluid proteins, as well as their roles in various biological processes. This resource is crucial for researchers and scientists studying cellular mechanisms, as it offers comprehensive insights into the behavior and significance of fluid proteins in health and disease.