passages.id: split_5_test_3123_passage
passages.type: progene_text
passages.text: While no altered peptide ligand was able to antagonize all six clones in the T cell panel , a single - substituted peptide of isoleucine to methionine at position 561 , which resides at the TCR contact p5 position , was able to antagonize five out of the six hGAD65 - responsive clones .