Folds:

1. b.1: Immunoglobulin-like beta-sandwich [48725] (14 superfamilies)

2. b.2: Common fold of diphtheria toxin/transcription factors/cytochrome f [49379] (7 superfamilies)

3. b.3: Prealbumin-like [49451] (6 superfamilies)

4. b.4: HSP40/DnaJ peptide-binding domain [49492] (1 superfamily)

5. b.5: alpha-Amylase inhibitor tendamistat [49497] (1 superfamily)

6. b.6: Cupredoxins [49502] (1 superfamily)

7. b.7: C2 domain-like [49561] (4 superfamilies)

8. b.8: TRAF domain [49598] (1 superfamily)

9. b.9: Neurophysin II [49605] (1 superfamily)

10. b.10: Viral coat and capsid proteins [49610] (1 superfamily)

11. b.11: gamma-Crystallin-like [49694] (1 superfamily)

12. b.12: Lipase/lipooxygenase domain [49722] (1 superfamily)

13. b.13: PNGase F-like [49741] (2 superfamilies)

14. b.14: Calpain large subunit, middle domain (domain III) [49757] (1 superfamily)

15. b.15: HSP20-like chaperones [49763] (1 superfamily)

16. b.16: Ecotin, trypsin inhibitor [49771] (1 superfamily)

17. b.17: Phosphatidylethanolamine binding protein [49776] (1 superfamily)

18. b.18: Galactose-binding domain-like [49784] (1 superfamily)

19. b.19: Segmented RNA-genome viruses' proteins [49817] (1 superfamily)

20. b.20: F-MuLV receptor-binding domain [49829] (1 superfamily)

21. b.21: Adenovirus fiber protein head domain (knob domain) [49834] (1 superfamily)

22. b.22: TNF-like [49841] (1 superfamily)

23. b.23: Spermadhesin, CUB domain [49853] (1 superfamily)

24. b.24: Hyaluronate lyase-like, C-terminal domain [49862] (1 superfamily)

25. b.25: Osmotin, thaumatin-like protein [49869] (1 superfamily)

26. b.26: SMAD/FHA domain [49878] (1 superfamily)

27. b.27: Soluble secreted chemokine inhibitor, VCCI [49888] (1 superfamily)

28. b.28: Paculovirus p35 [49893] (1 superfamily)

29. b.29: Concanavalin A-like lectins/glucanases [49898] (1 superfamily)

30. b.30: Supersandwich [49993] (3 superfamilies)

31. b.31: EV matrix protein [50011] (1 superfamily)

32. b.32: gp9 [50016] (1 superfamily)

33. b.33: ISP domain [50021] (1 superfamily)

34. b.34: SH3-like barrel [50036] (7 superfamilies)

35. b.35: GroES-like [50128] (2 superfamilies)

36. b.36: PDZ domain-like [50155] (1 superfamily)

37. b.37: N-terminal domains of the minor coat protein g3p [50175] (1 superfamily)

38. b.38: Sm motif of small nuclear ribonucleoproteins, SNRNP [50181] (1 superfamily)

39. b.39: Ribosomal protein L14 [50192] (1 superfamily)

40. b.40: OB-fold [50198] (7 superfamilies)

41. b.41: Photosynthetic reaction centre, H-chain, cytoplasmic domain [50345] (1 superfamily)

42. b.42: beta-Trefoil [50352] (5 superfamilies)

43. b.43: Reductase/isomerase/elongation factor common domain [50412] (3 superfamilies)

44. b.44: EF-Tu/eEF-1alpha C-terminal domain [50464] (1 superfamily)

45. b.45: FMN-binding split barrel [50474] (1 superfamily)

46. b.46: FMT C-terminal domain-like [50485] (1 superfamily)

47. b.47: Trypsin-like serine proteases [50493] (1 superfamily)

48. b.48: mu transposase, C-terminal domain [50609] (1 superfamily)

49. b.49: Domain of alpha and beta subunits of F1 ATP synthase-like [50614] (2 superfamilies)

50. b.50: Acid proteases [50629] (1 superfamily)

51. b.51: ValRS/IleRS editing domain [50676] (1 superfamily)

52. b.52: Double psi beta-barrel [50684] (2 superfamilies)

53. b.53: Ribosomal protein L25-like [50714] (1 superfamily)

54. b.54: Core binding factor beta [50722] (1 superfamily)

55. b.55: PH domain-like [50728] (1 superfamily)

56. b.56: Transcription factor IIA (TFIIA), N-terminal domain [50783] (1 superfamily)

57. b.57: Herpes virus serine proteinase, assemblin [50788] (1 superfamily)

58. b.58: Pyruvate kinase beta-barrel domain [50799] (1 superfamily)

59. b.59: XRCC4, N-terminal domain [50808] (1 superfamily)

60. b.60: Lipocalins [50813] (1 superfamily)

61. b.61: Streptavidin-like [50875] (3 superfamilies)

62. b.62: Cyclophilin (peptidylprolyl isomerase) [50890] (1 superfamily)

63. b.63: Oncogene products [50903] (1 superfamily)

64. b.64: Extracytoplasmic domain of cation-dependent mannose 6-phosphate receptor [50910] (1 superfamily)

65. b.65: tripple barrel [50915] (1 superfamily)

66. b.66: 4-bladed beta-propeller [50922] (1 superfamily)

67. b.67: 5-bladed beta-propeller [50933] (1 superfamily)

68. b.68: 6-bladed beta-propeller [50938] (4 superfamilies)

69. b.69: 7-bladed beta-propeller [50964] (7 superfamilies)

70. b.70: 8-bladed beta-propeller [50997] (2 superfamilies)

71. b.71: alpha-Amylases, C-terminal beta-sheet domain [51010] (1 superfamily)

72. b.72: WW domain-like [51044] (2 superfamilies)

73. b.73: Head domain of nucleotide exchange factor GrpE [51063] (1 superfamily)

74. b.74: Carbonic anhydrase [51068] (1 superfamily)

75. b.75: Bacteriochlorophyl A protein [51080] (1 superfamily)

76. b.76: Outer surface protein A [51086] (1 superfamily)

77. b.77: beta-Prism I [51091] (3 superfamilies)

78. b.78: beta-Prism II [51109] (1 superfamily)

79. b.79: beta-Roll [51119] (1 superfamily)

80. b.80: Single-stranded right-handed beta-helix [51125] (2 superfamilies)

81. b.81: Single-stranded left-handed beta-helix [51160] (2 superfamilies)

82. b.82: Double-stranded beta-helix [51181] (5 superfamilies)

83. b.83: Triple beta-spiral [51224] (1 superfamily)

84. b.84: Barrel-sandwich hybrid [51229] (3 superfamilies)

85. b.85: beta-clip [51268] (5 superfamilies)

86. b.86: Hedgehog/intein (Hint) domain [51293] (1 superfamily)

87. b.87: LexA/Signal peptidase [51305] (1 superfamily)

88. b.88: RabGEF Mss4 [51315] (1 superfamily)

89. b.89: Cyanovirin-N [51321] (1 superfamily)

90. b.90: Head-binding domain of phage p22 tailspike protein [51326] (1 superfamily)

91. b.91: E2 regulatory, transactivation domain [51331] (1 superfamily)

92. b.92: alpha-Subunit of urease, composite domain [51337] (1 superfamily)

93. b.93: Epsilon subunit of F1F0-ATP synthase N-terminal domain [51343] (1 superfamily)

More info for Class b: All beta proteins

Timeline for Class b: All beta proteins:

• Class b: All beta proteins appears in SCOP 1.57
  
• Class b: All beta proteins appears in the current release, SCOPe 2.08