Tangible Variations

The patterns of the woven contact maps show interactions among nucleosomes as the structure of chromatin reconfigures. Chromatin is a complex of DNA, RNA, and protein that is found in the nucleus of eukaryotic cells and is responsible for packaging and organizing the genetic material of a cell. The changing configuration of chromatin over time has important implications for gene expression, epigenetics, disease, and evolution. Simulations of chromatin configurations can be run with biophysical models from which contact map visualizations can be inferred. Contact maps are used by scientists to reveal changing structural features of chromatin such as interactions between DNA wound around the nucleosomes. They can reveal how a genome is organized and show how likely two parts of the genome are to be close to one another.

Adam Lamson generates simulated contact maps (representing different points in time or an ensemble average) from his biophysical models. Variations in patterns among the weavings are the result of different spatial positions of nucleosomes in the simulations that are represented with a spectrum of colors known as color maps. The Tangible Variations series incorporates the use of different color maps including "cubehelix", designed by Dave Green of the Astrophysics Group at Cavendish Laboratory. The title for the series was inspired by the term “intangible variation” also known as “developmental noise”, use to explain the role of external causes such as environmental conditions in phenotypic variation that cannot be attributed to genotype.

Studio Press Release for Seeing the Unseen Exhibition (excerpt)

Laura Splan  created her Tangible Variations series of weavings in collaboration with Adam Lamson, a Science Collaborator and theoretical biophysicist at the Flatiron Institute, a division of the Simons Foundation. Lamson creates computational simulations of how DNA organizes itself inside a cell with implications for how spatial shifts on a molecular scale can manifest changes in gene expression.

The abstract patterns found in Tangible Variations are result of multiple layers of translation, interpretation, and experimentation, performed by Lamson and Splan through the various technologies they employ in their working processes. Each of Splan’s computerized Jacquard woven tapestries traces its origin back to Lamson’s 3D chromatin simulations, from which he infers contact, also known as Hi-C, maps. These are essentially 2D scientific visualizations that detail how a genome is organized and predict the proximity of two parts of the genome. The contact maps are a “snapshot” of the molecular form at a single point in time, whereas the kymograph aggregate and represent all chromatin configurations over the duration of a simulation. Working from Lamson’s visualizations, Splan creates large, wall-displayed weavings made using a computerized Jacquard loom to explore what might emerge through a shift in materiality.

Across a grouping of three weavings, titled Tangible Variations (cubehelix): 5000, 5500, 6000 (all 2022), an intricate gridded pattern repeats with subtle variations in composition, evolving from one to the next. Based on three Hi-C maps, differences in composition between the weavings reveal changes in molecular configurations, with contrasting areas of light and dark indicating varying degrees of interaction. A stark, white diagonal bisects the imagery of each textile, extending from the lower left corner to the upper right to establish a mirrored, fractal-like configuration of bright clusters bleeding into one another or else receding into an inky expanse. An individual tapestry, Tangible Variations (cubehelix): kymograph (2022) deviates from the stark rectilinear patterning seen in her triptych, instead depicting an organic, rippling field of staticky textures. If a Hi-C map is like a film still, a kymograph is the entire film reel; it aggregates all the interactions tracked over the full duration of the simulation, showing the process unfolding over time from left to right. Deep blue and green threads dominate a dark and densely scrawled form that seeps in from the left edge of the tapestry towards the center, before abruptly yielding to patchy, undulating swathes of noise. The term “cubehelix” in the artwork titles derives from the name of the color map or palette used by Lamson and Splan in the works. Developed by Dave Green of the Astrophysics Group at University of Cambridge Cavendish Laboratory, cubehelix is a specific spectrum of colors designed to factor in the perception of color intensity, color vision deficiency, and reproducibility in black and white to ensure legibility of scientific visualizations across a broad range of users and applications. It is based on an RGB (red, green, and blue) color model, the same as a computer screen, and similar to their weavings’ palette of red, green, blue, yellow, white, and black threads.

As a scientist might introduce a random factor or seed to drive a computation, Splan’s decision to reimagine Lamson’s visualizations as computerized Jacquard weavings for artistic purposes catalyzes a host of intended and unforeseen deviations. The works that comprise Tangible Variations represent information at a much larger scale than their source; this, in combination with the interwoven nature of the textiles, results in some loss in translation while making way for new interpretations. Areas of repetition in the resulting woven image are thrown into greater relief, distilling patterns in the weave that were not readily apparent before Splan rendered them as tactile objects. In a poetic gesture, the fibers that make up the Tangible Variations echo the simulated genetic fibers that informed their designs. Their familiar materiality and the ability to interact with the weavings as aesthetic objects afford viewers an unexpected, embodied way to experience an interpretation of abstract, molecular phenomena.

— Text by Renee Delosh