Skip to Main Content

Alpha Helix Beta Sheet Collection

Alpha Helix Beta Sheet Collection Model Classroom Set

Lending Library Update

Due to the COVID-19 pandemic, the MSOE Model Lending Library has suspended operations. Before reopening, we need to identify safe ways of disinfecting library materials between uses. We hope to have decisions made by mid-July about which materials will be available for loan in the fall.


Teaching Points

The linear amino acid sequence defines the primary structure of a protein. Regions of the linear polypeptide chain fold into the stable α-helix and β-sheet structures to form the protein secondary structure. The tertiary protein structure is the overall three-dimensional shape of the protein. With this model collection, students can assemble an α-helix or anti-parallel β-sheet, compare the phi-psi angles of the two secondary structures, and explore the contribution of hydrogen bonding to the stability of the structure. Models of the α-helix and β-sheet, with and without side chains, allow comparison of the features of the two secondary structures. Two protein models display tertiary protein structure. The β-globin protein consists predominantly of α-helices while the green fluorescent protein (GFP) consists predominantly of a β-sheet.

Models in the Collection

  • α-helix without sidechains
  • α-helix with sidechains
  • β-sheet without sidechains
  • β-globin protein
  • Green fluorescent protein (GFP)
  • 6 α-Helix β-Sheet Construction Kits


Requesting this Model

Loan Time Frame: 3 weeks


  • Use the calendar below to select a three week loan. Available times are shown in green. Select a date one week prior to the date you want the model to arrive. After selecting your time period, select checkout and complete the booking details.
  • This loan includes both delivery and return shipping time. Please make sure to plan time (approximately one week) for us to deliver the model to you. You can expect the model to arrive approximately one week following the first day of the requested loan period.


  • Use the calendar below to select a three week loan. Available times are shown in green. Select the date you want to pick up the model. After selecting your time period, select checkout and complete the booking details.

Requesting Other Models

You may schedule one copy of a model for three weeks. Due to limited resources, we are unable to loan multiple copies or additional materials.

If you would like to request a loan of a different model for the same time frame you may add this to your cart. Up to three different types of models may be checked out at one time. You will need to fill out a separate request for model loans with a different time frame.


Please contact us at with any questions about the lending process or the availability of models.

Contact Margaret Franzen at or (414) 277-2824 with questions about the models, teaching resources or educational content.



Model Documentation and Instructions

Teaching Points and Inventory
Activities for the α-Helix and β-Sheet Construction Kit
Modeling of Helix A of β-Globin
Modeling a β-Sheet of Green Fluorescent Protein

Returning Models

Models must be returned on or before the due date.

Borrowers are responsible for return shipping costs. We recommend using FedEx or UPS with "two-day ground" transportation. Please make sure to get a tracking number for the shipment.

Please take care when returning models. Any damage incurred in return shipping due to improper packing will be charged to the borrower.

Ship models to:
Milwaukee School of Engineering
1000 N. Market Street
Milwaukee, WI 53202-3113
   Available    Your Booking    Unavailable/Padding