when chromosomes irradiated with uv light ( 253.7 nm , 5.2 j/m2/s ) for more than 5 h were stained with 1 % to 4 % giemsa in phosphate buffered saline ( pbs ) or in distilled water , the resulting scd invariably belonged to the b-light type in which the tb-chromatid stained lightly .
C0008633
chromosomes
C0008545
chromatid