Wikipedia lists a few examples of tri-peptides, including:
- Eisenin (pGlu-Gln-Ala-OH) is a peptide with immunological activity that is isolated from the Japanese marine alga, Eisenia bicyclis, which more commonly is known as, Arame
- GHK-Cu (glycyl-L-histidyl-L-lysine) is a human copper binding peptide with wound healing and skin remodeling activity, which is used in anti-aging cosmetics and more commonly referred to as copper peptide
- Glutathione (γ-L-Glutamyl-L-cysteinylglycine) is an important antioxidant in animal cells
- Isoleucine-proline-proline (IPP) found in milk products, acts as an ACE inhibitor
- Leupeptin (N-acetyl-L-leucyl-L-leucyl-L-argininal) is a protease inhibitor that also acts as an inhibitor of calpain
- Melanostatin (prolyl-leucyl-glycinamide) is a peptide hormone produced in the hypothalamus that inhibits the release of melanocyte-stimulating hormone (MSH)
- Ophthalmic acid (L-γ-glutamyl-L-α-aminobutyryl-glycine) is an analogue of glutathione isolated from crystalline lens
- Norophthalmic acid (y-glutamyl-alanyl-glycine) is an analogue of glutathione (L-cysteine replaced by L-alanine) isolated from crystalline lens
- Thyrotropin-releasing hormone (TRH, thyroliberin or protirelin) (L-pyroglutamyl-L-histidinyl-L-prolinamide) is a peptide hormone that stimulates the release of thyroid-stimulating hormone and prolactin by the anterior pituitary
- ACV (δ-(L-α-aminoadipyl)-L-Cys-D-Val) is a key precursor in penicillin and cephalosporin biosyntheses.
I used EQ7 to lay out the colors and to try out different arrangements. I used complementary colors (green, purple) to represent the two DNA base pairs (i.e. purples for A:T vs greens for G:C), and light shades for the pyrimidines (T,C), and dark shades for the purines (A, G) or vice versa. Fabrics are Moda solids (I think I like the solids best), and small scale tone-on-tone prints.
The next thing was to stitch the hexagons together to form the sequence. I used Superior Kimono Silk. This is a very thin, strong, smooth thread. It was great to work with. The result is a freestanding piece that is positioned on a back ground fabric and appliqued in place with an invisible thread like Superior Monopoly using a very narrow zigzag. When the shape is firmly appliqued in place, then I snip the back and cut away the background behind the applique. This exposes and allows removal of the paper hexagons.
|Back of another project showing cutting away behind the applique.|
The sweeping curves (walking foot) and outer sections (free motion) were quilted with lime green aurifil on the top and a dark purple auriful in the bobbin. For the matchstick and stipple quilting, I switched to a pale purple Invisifil (Wonderfil) on the top and a light purple Bottomline (Superior) in the bobbin. I sometimes have problems with invisifil breaking or shredding, but this time is worked with no problems. Matchstick quilting was done free-hand, with only a couple of reference lines marked to keep things vertical. The fine match-sticks show the letters in relief, which I think looks pretty cool (see We <3 Pam for another example).
|GSH -- Top||IPP -- Top|
Since these are going to be for sale in the art show, I wanted to be sure that buyers know what the quilt is about and to provide an easy way to hang the quilt. I used the corner triangle method and added label information to one of the triangles.
|GSH -- Back||IPP -- Back|
I love how these turned out and hope someone else will love them too. The next ones will be blue/turquoise and orange/yellow, and I'm looking forward to starting on them. The units are prepped -- now they just have to be pieced together.
Unfortunately, they won't get done in time for this year's Art Show.
Thanks for stopping by ... (comments are much appreciated).
Since I've only finished two peptides and the others are in progress, I'm linking up with http://www.freshlypieced.com/2015/07/wip-wednesday-scrap-happy.html .