A Quote by Karl Landsteiner

On the whole, at least in the author's experience, the preparation of species-specific antiserum fractions and the differentiation of closely related species with precipitin sera for serum proteins does not succeed so regularly as with agglutinins and lysins for blood cells. This may be due to the fact that in the evolutional scale the proteins undergo continuous variations whereas cell antigens are subject to sudden changes not linked by intermediary stages.

Karl Landsteiner

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Author Blood Blood Cells Cell Cells Changes Closely Continuous Differentiation Does Due Experience Fact Fractions Intermediary Least Linked May Preparation Proteins Regularly Related Scale Species Specific Stages Subject Succeed Sudden Sudden Change Undergo Variations Whereas Whole

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Karl Landsteiner
Austrian - Scientist
June 14, 1868 - June 26, 1943

I have recently observed and stated that the serum of normal people is capable of clumping the red cells of other healthy individuals... As commonly expressed, it can be said that in these cases at least two different kinds of agglutinins exist, one kind in A, the other in B, both together in C. The cells are naturally insensitive to the agglutinins in their own serum.

Karl Landsteiner

We have seen that blood united to blood in the case of but remotely connected species of animals, kills; blood united to blood in the case of more closely allied species of animals does not kill. The physical organism of man survives when strange blood comes in contact with strange blood, ... but clairvoyant power perishes under the influence of this mixing of blood, or exogamy.

Rudolf Steiner

Clearly, we are a species that is well connected to other species. Whether or not we evolve from them, we are certainly very closely related to them. A series of mutations could change us into all kinds of intermediate species. Whether or not those intermediate species are provably in the past, they could easily be in our future.

George M. Church

There is part of a structure in which every species is related to every other species. And they're built up on species, like a pyramid. The simpler cell organisms, and then the more complicated ones, all the way up to the mammals and birds and so forth. We call it 'developing upward'... The whole thing depends on every part of it. And we're taking out the stones from the pyramid.

W. S. Merwin

There are over 7,000 different types of proteins in typical eukaryotic cells; the total number depends on the cell class and function.

Ada Yonath

So many of the chemical reactions occurring in living systems have been shown to be catalytic processes occurring isothermally on the surface of specific proteins, referred to as enzymes, that it seems fairly safe to assume that all are of this nature and that the proteins are the necessary basis for carrying out the processes that we call life.

John Desmond Bernal

Proteins are constantly being degraded. Therefore, simultaneous production of proteins is required.

Ada Yonath

Brain cells are normally not sensitive to light. So by introducing light-sensitive proteins into specific types of neurons, we can now selectively control that specific type of neuron by shining light in the brain.

Feng Zhang

I became aware of the very complex internal organization in a cell from the basic science classes, and it made me think about how all that could work. It seemed like a great mystery, especially how organelles in the cell can be arranged in three dimensions, and how thousands of proteins could find their way to the right location in the cells.

James Rothman

We are looking at gene therapies to Reverse Atherosclerosis, Regenerate muscles and tissue, Improve cell signaling, Clear misfolded Proteins, Rejuvenate the immune System, Clear Senescent Cells, and Treat Monogenic Diseases.

Liz Parrish

But we must here state that we should not see anything if there were a vacuum. But this would not be due to some nature hindering species, and resisting it, but because of the lack of a nature suitable for the multiplication of species; for species is a natural thing, and therefore needs a natural medium; but in a vacuum nature does not exist.

Roger Bacon

The development of methods to monitor protein dynamics in cells together with the discovery of specific and general lysosomal inhibitors have resulted in the identification of different classes of cellular proteins, long- and short-lived, and the findings of the differential effects of the inhibitors on these groups.

Aaron Ciechanover

Closely related species of birds are also chromosomally similar.

Peter R. Grant

With its untold depths, couldn't the sea keep alive such huge specimens of life from another age, this sea that never changes while the land masses undergo almost continuous alteration? Couldn't the heart of the ocean hide the last–remaining varieties of these titanic species, for whom years are centuries and centuries millennia?

Jules Verne

So the technology that does the least alteration of nature, the least harm to other species and systems, and provides the greatest intimacy of human with nature, is the best. We could make a scale with that in mind, and judge any technology by its place on that scale: speech and eyeglasses, say, would rank low; nuclear bombs and coal plants, high.

Kirkpatrick Sale

If new species arise very rapidly in small, peripherally isolated local populations, then the great expectation of insensibly graded fossil sequences is a chimera. A new species does not evolve in the area of its ancestors; it does not arise from the slow transformation of all its forbears. co-author with Niles Eldridge

Stephen Jay Gould

A Quote by Karl Landsteiner

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