I have been in a long-term association with him.

Cytology is a branch of biology that studies the structure and function of cells.

The cytosol is the liquid part inside the cell, and many enzymatic reactions occur here.

Stem cell research is opening up new frontiers in medicine.

I was born and raised in Kansai.

He sent a reminder letter about the unpaid charges.

My hobby is cultivating tomatoes.

It looked as if the painting came to life again.

He apologized to me again and again.

The cell nucleus holds genetic information.