go_id,ontology,go_term,term_definition,evidence GO:0000413,BP,"protein peptidyl-prolyl isomerization","The modification of a protein by cis-trans isomerization of a proline residue.",IEA GO:0003755,MF,"peptidyl-prolyl cis-trans isomerase activity","Catalysis of the reaction: peptidyl-proline (omega=180) = peptidyl-proline (omega=0).",IDA GO:0005509,MF,"calcium ion binding","Interacting selectively and non-covalently with calcium ions (Ca2+).",IDA GO:0005528,MF,"FK506 binding","Interacting selectively and non-covalently with the 23-membered macrolide lactone FK506.",TAS GO:0005788,CC,"endoplasmic reticulum lumen","The volume enclosed by the membranes of the endoplasmic reticulum.",IDA GO:0005789,CC,"endoplasmic reticulum membrane","The lipid bilayer surrounding the endoplasmic reticulum.",IEA GO:0061077,BP,"chaperone-mediated protein folding","The process of inhibiting aggregation and assisting in the covalent and noncovalent assembly of single chain polypeptides or multisubunit complexes into the correct tertiary structure that is dependent on interaction with a chaperone.",IDA