Fold: Fertilization protein

core: 3 helices; bundle, closed, right-handed twist; up-and-down

Lineage:

1. Root: scop
2. Class: All alpha proteins
3. Fold: Fertilization protein
   core: 3 helices; bundle, closed, right-handed twist; up-and-down

Superfamilies:

1. Fertilization protein (1)
   1. Fertilization protein (3)
      1. Lysin
         1. Red abalone (Haliotis rufescens) (4)
         2. Green abalone (Haliotis fulgens) (1)
      2. SP18
         1. Abalone (Haliotis fulgens) (1)