Adaptor Proteins, Signal Transducing; Carrier Proteins/metabolism; Nuclear Proteins; Phosphoproteins/metabolism; Protein-Tyrosine Kinases/metabolism; Receptors, Antigen, T-Cell/metabolism; Amino Acid Sequence; Base Sequence; Carrier Proteins/biosynthesis; Carrier Proteins/chemistry; Cloning, Molecular; DNA-Binding Proteins/metabolism; Female; Humans; Jurkat Cells; Male; Molecular Sequence Data; Molecular Weight; NFATC Transcription Factors; Organ Specificity; Phosphoproteins/biosynthesis; Phosphoproteins/chemistry; Polymerase Chain Reaction; RNA, Messenger/analysis; Recombinant Fusion Proteins/biosynthesis; Recombinant Fusion Proteins/metabolism; T-Lymphocytes; Transcription Factors/metabolism; Transcriptional Activation; Transfection