81 aa; DCH = 0, DCS = 0 . 10 . 20 . 30 . 40 . 50 . 60 MKTLLLTTVVVTIVCLDLEYTLKCNKLVPLFYKTCPAGKNLCYKMFMVATPKVPVKRGCI helix HHHHHH HHHHHHH HHH HHHH sheet EEEEEEEEEE EEEEEEEEE EEEEE E E EE turns TT TTTT T T TT coil C C . 70 . 80 DVCPKSSLLVKYVCCNTDRCN helix sheet EEE EEEEEEEE turns TTTT TTTTTT coil Residue totals: H: 20 E: 39 T: 20 C: 2 percent: H: 30.8 E: 60.0 T: 30.8 C: 3.1