another breakfast:

mattie:
reading a cereal box

jimmi says biting my fingernails causes appendicitis:

mom:
fingernails are keratin mattie

mattie:
keratin is a protein

mom:
globular or structural?

mattie:
structural like your beautiful hair

mom:
hair that would stay put if you would comb it once in a while

mattie:
hair that curls and won't stay put

mom:
you can blame your dad for the disulfide bridges...

mattie:
so what about my appendicitis? it killed Houdini, i know i'm next

mom:
and who chops up proteins?

mattie:
serine proteases?

mom:
and where do those live?

mattie:
between your fingers and your appendix?

mom:
get ready for school