Bands

Range (cm−1)

Free HSA

DA concentrations

Amide I

1700 - 1600

0.0

0.3 mM

0.4 mM

0.5 mM

0.6 mM

0.7 mM

β-sheets

1609

---

1609

---

1610

1610

β-sheets

1622

1621

1622

1622

1623

1623

Random

1636

1636

1636

1636

1636

1636

α-helix

1656

1654

1655

1655

1655

1655

Turns

1681

1681

1681

1680

1680

1681

β-sheets

1695

1695

1695

1695

1695

1695

Amide II

1600 - 1480

β-sheets

1493

1494

1494

1495

1495

1494

Random

1520

1523

1521

1523

---

---

α-helix

1540

1542

1543

1543

1544

1544

Turn

1574

1575

1576

1576

1575

1575

β-sheets

1592

1594

1593

1593

1593

1593

Amide III

1320 - 1220

β-sheets

1231

1231

1231

1231

1231

1231

β-sheets

1245

1245

1245

1245

1245

1245

Random

1268

1271

1268

1267

1270

1268

turn

1294

1293

1293

1293

1291

1290

α-helix

1310

1309

1310

1310

1310

1310