A round metal disc hung on a light chain around his neck.

He saw now that the guys were actually light chains.

She took a step forward, and brushed past a hanging light chain.

About half of people with light chain deposition disease also have multiple myeloma.

He reached into the darkness on his right side, passed his hand through the air, found the light chain, and pulled it.

He went inside, felt for the light chain, pulled on it.

The light chains remain intact and attached to the heavy chain.

He opened the closet door and yanked on the light chain.

One is called the light chain, the other the heavy chain.

She pulled the light chain hanging from the closet ceiling and looked around the small room.