" For 10 points, name this protein slides along actin to produce muscle contraction.
A nuclear isoform of this protein's Class I co-localizes with RNA polymerase II and is required for transcription initiation. This protein's Class VI is absent in the Snell's waltzer mutant; that class, class VII, and class XV are missing or malformed in a variety of nonsyndromic hearing impairments including Usher's syndrome. Class II of this protein contains two regulatory light chains, two essential light chains, and two heavy chains. That class is found in the A band of a sarcomere, is connected to titin at the M line, and makes up most of the "thick filaments." For 10 points, name this protein slides along actin to produce muscle contraction.
A nuclear isoform of this protein's Class I co-localizes with RNA polymerase II and is required for transcription initiation.
{myosin}