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[KATO Takako 加藤 高子]

Hi! Can I ask more about contamination? For bacterial contamination,
how much concentration of antibiotics do you use? We use 25k units of 
penicilin and 5mg of kanamycin per liter but cannot avoid
contamination perfectly. Thanks in advance for your help.

Takako Kato       (^_^)/
$B&+(B $B&+(B                   kato at uni.zool.s.u-tokyo.ac.jp
$B"_"_(B                    Phone. 03-3812-2111 ext.4429
 $B"@(B   Hummy     $B!!!!!!(B  Fax.     03-3816-1965