99精品久久99久久久久,亚洲国产成人精品无码一区二区,国产精品亚洲综合色区韩国,久久精品第一国产久精国产宅男66,亚洲国产日韩欧美一区二区三区,久久久久久精品免费无码无,国产中年熟女高潮大集合,亚洲AV无码成H在线观看

1. Remove and discard culture medium.
2. Briefly rinse the cell layer with 0.25% (w/v) Trypsin- 0.53 mM EDTA solution to remove all traces of serum that contains trypsin inhibitor.
3. Add 2.0 to 3.0 ml of Trypsin-EDTA solution to flask and observe cells under an inverted microscope until cell layer is dispersed (usually within 5 to 15 minutes).
   Note: To avoid clumping do not agitate the cells by hitting or shaking the flask while waiting for the cells to detach. Cells that are difficult to detach may be placed at 37°C to facilitate dispersal.
4. Add 6.0 to 8.0 ml of complete growth medium and aspirate cells by gently pipetting.
5. Add appropriate aliquots of the cell suspension to new culture vessels.
6. Incubate cultures at 37°C.

Spengler BA, et al. Morphology and growth, tumorigenicity, and cytogenetics of human neuroblastoma cells established in vitro. In Vitro 8: 410, 1973.

Goodfellow M, et al. One hundred and twenty-seven cultured human tumor cell lines producing tumors in nude mice. J. Natl. Cancer Inst. 59: 221-226, 1977. PubMed: 77210034

Seeger RC, et al. Morphology, growth, chromosomal pattern and fibrinolytic activity of two new human neuroblastoma cell lines. Cancer Res. 37: 1364-1371, 1977. PubMed: 856461

Rostomily RC, et al. Expression of neurogenic basic helix-loop-helix genes in primitive neuroectodermal tumors. Cancer Res. 57: 3526-3531, 1997. PubMed: 9270024

Gromeier M, et al. Internal ribosomal entry site substitution eliminates neurovirulence in intergeneric poliovirus recombinants. Proc. Natl. Acad. Sci. USA 93: 2370-2375, 1996. PubMed: 8637880

Seeger RC, et al. Morphology, growth, chromosomal pattern and fibrinolytic activity of two new human neuroblastoma cell lines. Cancer Res. 37: 1364-1371, 1977. PubMed: 856461