The measurement in point 13 on page 299 was not correct.

The correct text read as below.

Culture medium: DMEM, 10% fetal calf serum (FCS), 5 x 10-5 M 2-mercapto-ethanol, 1% nonessential amino acids, 10 mM HEPES, 100 U/ml Penicillin/Streptomycin, 10 ug/ml Ciprofloxacin (see Note 3).