Polypeptides as vitro active cell growth enhancing factors and methods of use
US3953290A · kind A · utility
5Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1973 |
| Grant date | Apr 27, 1976 |
| Priority date | — |
| Expiry date | Apr 30, 1993 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07K14/475
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
Disclosed are in vitro active cell growth factors that stimulate deoxyribonucleic acid synthesis in the cells, are polypeptide in chemical structure, having a molecular weight range of from 4,000 to 6,000 and an isoelectric range of from pH 4.3 to 5.3, are inert to about 72% aqueous ethanol containing by volume about 0.047% of concentrated hydrochloric acid, soluble in and precipitated from such acid aqueous ethanol solution by admixing in it 3.5 times its volume of a mixture of five parts of acetone with three parts of ethanol, and are soluble in about twice their weight of 20% formic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.