| Answer | Crossword Clue |
|---|---|
| KERATIN | Fibrous protein |
| KERATIN | A fibrous protein |
| ceratin | a fibrous protein |
| keratins | KERATIN, a fibrous protein |
| ceratins | CERATIN, a fibrous protein |
| conchiolin | a fibrous protein substance that forms the basic structure of the shell of molluscs |
| conchiolins | CONCHIOLIN, a fibrous protein substance that forms the basic structure of the shell of molluscs |
| fibrin | a white insoluble fibrous protein formed from fibrinogen by the action of thrombin especially in the clotting of blood |
