and 49 , xxxxx chromosomal constitution , and in fibroblasts from a patient with xeroderma pigmentosum ( de sanctis-cacchione syndrome ) , the rate of dna replication does not differ from that in normal cells , varying in a single fork from 0.2 to 1.0 micrometer/min with a mean of about 0.6 micrometer/min .
C0016030
fibroblasts
C0007634
normal cells