摘要:
As a result of dedicated research, the present inventors have successfully invented a collagen gene construct which can be easily purified and maintains a triple helix structure equivalent to that of naturally-occurring collagen while having a low molecular weight. Specifically, one-step purification by affinity purification is enabled because CR-D (a signal peptide) has a carbohydrate recognition domain. By substituting a portion of a human collagen structural gene of the present invention with the collagen-like structural gene portion of MBL, a low-molecular-weight collagen which maintains a triple helix structure and is thermally stable can be obtained with high purity and in large quantities.
摘要:
The present inventors conducted dedicated studies and successfully constructed expression vectors that enable high-level production of foreign gene-derived proteins in mammalian host cells, which comprise a translation-impaired dihydrofolate reductase gene cistron whose expression has been attenuated by altering the codons to the least frequently used codons in mammals; and a gene cassette which has a cloning site for incorporation of a foreign gene between a highly transcriptionally active promoter and a highly stable polyadenylation signal.
摘要:
The present inventors conducted dedicated studies and successfully constructed expression vectors that enable high-level production of foreign gene-derived proteins in mammalian host cells, which comprise a translation-impaired dihydrofolate reductase gene cistron whose expression has been attenuated by altering the codons to the least frequently used codons in mammals; and a gene cassette which has a cloning site for incorporation of a foreign gene between a highly transcriptionally active promoter and a highly stable polyadenylation signal.
摘要:
As a result of dedicated research, the present inventors have successfully invented a collagen gene construct which can be easily purified and maintains a triple helix structure equivalent to that of naturally-occurring collagen while having a low molecular weight. Specifically, one-step purification by affinity purification is enabled because CR-D (a signal peptide) has a carbohydrate recognition domain. By substituting a portion of a human collagen structural gene of the present invention with the collagen-like structural gene portion of MBL, a low-molecular-weight collagen which maintains a triple helix structure and is thermally stable can be obtained with high purity and in large quantities.
摘要:
A respiratory tract widening tool capable of reliably managing a respiratory tract in a supine posture and freely changing the posture, and a respiratory tract widening unit provided therewith are provided.
摘要:
A respiratory tract widening tool capable of reliably managing a respiratory tract in a supine posture and freely changing the posture, and a respiratory tract widening unit provided therewith are provided.