Thumbpins

Mar 18

freshphotons:

KcsA Potassium Channel, Mike Tyka.
Copper, Steel

“Potassium channels form potassium-selective pores that span cell membranes. They are the most widely distributed type of ion channel found in virtually all living organisms. The four identical subunits are situated in a four-fold symmetrical manner around a central pore, which allows potassium ions to pass freely.  At the top of the structure, formed by four loops lining the pore, a selectivity filter is situated which prevents other ions (such as sodium ions) from passing. The correct ions are detected by their size and charge. Note that that no active pumping of ions occurs; it merely allows passive conductance of ions down the con-centration gradient between the two sides of the membrane.”

(via freshphotons)


Mar 12
“Women are attracted to people that they look up to, and men tend to be attracted to women that will fuck them.” Sarah Silverman (You Made It Weird with Pete Holmes)

(Source: jim-stansel, via khyan)


Mar 9
devinkatie:

caitlinrcruz:

via Gawker Artists

Today I need this.

devinkatie:

caitlinrcruz:

via Gawker Artists

Today I need this.

(Source: caitlinrstark)


Mar 6

Mar 2


Mar 1

(via sparrowjames)



(Source: sparrowjames)


Feb 16

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