http://www.unc.edu/ugradbulletin/depts/compsci.html lists CS courses at UNC-CH
The intro sequence of (110, 116, or 121), 401, 410 is probably useful in general if you want to learn the basics of CS. 283, 411, 530, 550, 431, 521, 523, 535 may be of interest if you want to go more in depth in CS. 555 may also be of interest specifically for computational biology.